The Houses of Parliament - an iconic London site that attracts visitors from all over the world.

Tourism is now worth 22.1 billion pounds (32 billion US dollars) annually to the UK, according to Visit Britain, Britain's national tourism agency.

Visit Britain also said that last year there were 36.1 million tourist visits, with 67 percent from the European Union.

On 23 June, the UK will vote in a referendum whether to stay in or out of the EU and many in the tourist industry are concerned that a possible leave vote will jeopardise the European holiday market.

One of those is Kyle Haughton, managing director of City Cruises.

His cruise ships carry 6 million passengers a year - in the height of summer 60 percent are from abroad, the majority from the EU.

Of the 240 staff that he employs, 50 percent are from outside the UK, mostly from the EU.

"Any change or decline in passengers coming into the country is going to affect our business quite lot and there are reports that people in Germany, Italy and France are less likely to come to the UK if we leave the EU than if we stay."

His fears are backed up by UK Inbound, which represents 360 tourist businesses.

Deidre Wells, chief executive of UKinbound has called leaving the EU "economic suicide."

"Why would you remove yourself from a market that provides two thirds of our business for our members," she said.

Tourists had mixed views about a UK "brexit".

Marco Ghiribelli, an Italian tourist, said he thought the UK would be economically better outside.

"It's not economically convenient for the UK to stay in the EU. Brexit makes sense economically as the UK economy is stronger than most of the EU countries."

Others such as Babette Pascalev, a tourist from Germany, said: "I think it is hard now because the idea is to get Europe together not apart."

But others say a Brexit would not make any difference to the tourism business.

They say nothing will change.

Alexander Goransson, travel analyst at Euromonitor International believes the expected drop in sterling following a brexit vote would attract tourists due to an increased spending power.

"In the short term I would expect to see a depreciation of the pound which will have both a positive and negative impact on tourism. UK tourists would be less likely to travel abroad and stay at home, whereas on the other hand the UK would actually become a more attractive destination for inbound tourists as prices would be relatively cheaper."

But most people in the tourist industry are hoping for a remain vote on June 23.

The Houses of Parliament - an iconic London site that attracts visitors from all over the world.

Tourism is now worth 22.1 billion pounds (32 billion US dollars) annually to the UK, according to Visit Britain, Britain's national tourism agency.

Visit Britain also said that last year there were 36.1 million tourist visits, with 67 percent from the European Union.

On 23 June, the UK will vote in a referendum whether to stay in or out of the EU and many in the tourist industry are concerned that a possible leave vote will jeopardise the European holiday market.

One of those is Kyle Haughton, managing director of City Cruises.

His cruise ships carry 6 million passengers a year - in the height of summer 60 percent are from abroad, the majority from the EU.

Of the 240 staff that he employs, 50 percent are from outside the UK, mostly from the EU.

"Any change or decline in passengers coming into the country is going to affect our business quite lot and there are reports that people in Germany, Italy and France are less likely to come to the UK if we leave the EU than if we stay."

His fears are backed up by UK Inbound, which represents 360 tourist businesses.

Deidre Wells, chief executive of UKinbound has called leaving the EU "economic suicide."

"Why would you remove yourself from a market that provides two thirds of our business for our members," she said.

Tourists had mixed views about a UK "brexit".

Marco Ghiribelli, an Italian tourist, said he thought the UK would be economically better outside.

"It's not economically convenient for the UK to stay in the EU. Brexit makes sense economically as the UK economy is stronger than most of the EU countries."

Others such as Babette Pascalev, a tourist from Germany, said: "I think it is hard now because the idea is to get Europe together not apart."

But others say a Brexit would not make any difference to the tourism business.

They say nothing will change.

Alexander Goransson, travel analyst at Euromonitor International believes the expected drop in sterling following a brexit vote would attract tourists due to an increased spending power.

"In the short term I would expect to see a depreciation of the pound which will have both a positive and negative impact on tourism. UK tourists would be less likely to travel abroad and stay at home, whereas on the other hand the UK would actually become a more attractive destination for inbound tourists as prices would be relatively cheaper."

But most people in the tourist industry are hoping for a remain vote on June 23.

London - 2 June 2016

1. Houses of Parliament seen from a river cruise boat

2. Woman taking picture of the Houses of Parliament

3. The London Eye seen from a river cruise boat

4. Part of the London Eye

5. Woman taking photo

6. People on board the river cruise boat

7. St Paul's Cathedral and other buildings

8. River cruise boat approaching Tower Bridge

9. Set up of Kyle Haughton, managing director of City Cruises

10. SOUNDBITE (English) Kyle Haughton, managing director of City Cruises:

"At City Cruises we carry 4 million passengers a year and over half of them come from overseas, the majority of which coming from EU countries, so any change or decline in passengers coming into the country is going to affect our business quite lot and there are reports that people in Germany, Italy and France are less likely to come to the UK if we leave the EU than if we stay."

London - 1 June 2016

11. Various of Deidre Wells, chief executive of UKinbound, at her desk

12. SOUNDBITE (English) Deidre Wells, chief executive of UKinbound:

"I've described it as economic suicide in the past. Why would you deliberately remove yourself from a market that provides two thirds of our business for our members."

London - 2 June 2016

13. People on board the river cruise boat with the Shard in the background

14. Set up of French tourist Kahina Berroua

15. SOUNDBITE (French) Kahina Berroua, French tourist:

"I will be sad. The UK has a lot of power in Europe so it won't be the same."

16. Various of tourists inside the river cruise boat

17. Set up of Marco Ghiribelli, Italian tourist

18. SOUNDBITE (Italian) Marco Ghiribelli, Italian tourist:

"It's not economically convenient for the UK to stay in the EU. Brexit makes sense economically as the UK economy is stronger than most of the EU countries."

19. SOUNDBITE (German) Babette Pascalev, tourist from Germany:

"I think it is hard now because the idea is to get Europe together not apart."

20. Houses of Parliament with open top tourist bus driving past

21. Union Jack flag on top of the Houses of Parliament

22. People on open top bus driving past the Houses of Parliament

23. People on bus

24. People on bus driving past flags

25. Various of Alexander Goransson, travel analyst at Euromonitor International, on laptop

26. SOUNDBITE Alexander Goransson, travel analyst at Euromonitor International:

"In the short term I would expect to see a depreciation of the pound which will have both a positive and negative impact on tourism. UK tourists would be less likely to travel abroad and stay at home, whereas on the other hand the UK would actually become a more attractive destination for inbound tourists as prices would be relatively cheaper."

27. People on open top bus

28. View of London black cabs and Union Jack flags

In the sunny seaside resort city of Benidorm, which has a vibrant British community of around 3,500 people, British expats expressed their concerns about what a Brexit can mean for them, with work permits, health care and pensions among the top worries.

Their situation will be one of the things to be negotiated between the UK and the European Union in the coming months and years after Britain voted Thursday to leave the bloc.

The British expat community in Spain was split between those who could vote and those, like bar owner Chuck Daulson, who have lived away from Britain for longer than 15 years, disqualifying them from voting in the referendum.

He was concerned he would have to go back to Britain and lose all he's worked for in the 23 years he's lived and worked in Spain.

While being one of the largest communities of British people living abroad with around 300,000 officially registered as residents, Spain is a key holiday destination for British tourists.

The outcome of the vote was also a concern for Spaniards making a living off the tourism industry, which, in places like Benidorm, depends heavily on British travellers.

In the sunny seaside resort city of Benidorm, which has a vibrant British community of around 3,500 people, British expats expressed their concerns about what a Brexit can mean for them, with work permits, health care and pensions among the top worries.

Their situation will be one of the things to be negotiated between the UK and the European Union in the coming months and years after Britain voted Thursday to leave the bloc.

The British expat community in Spain was split between those who could vote and those, like bar owner Chuck Daulson, who have lived away from Britain for longer than 15 years, disqualifying them from voting in the referendum.

He was concerned he would have to go back to Britain and lose all he's worked for in the 23 years he's lived and worked in Spain.

While being one of the largest communities of British people living abroad with around 300,000 officially registered as residents, Spain is a key holiday destination for British tourists.

The outcome of the vote was also a concern for Spaniards making a living off the tourism industry, which, in places like Benidorm, depends heavily on British travellers.

Benidorm - June 24 2016

1. Various of beach in Benidorm

2. Various of tourists watching British Prime Minister David Cameron's resignation on TV in a bar

3. SOUNDBITE (English) Chuck Daulson, Englishman living in Spain for 23 years, 51-year-old bar owner:

"We're very scared because I've been here 23 years, I've got my house, my kids were born here, they've been to Spanish school, I've got a bar, I've got a lot to lose. If I go back to England, I've got nothing. No house. Nothing."

4. England flags hanging in the bar

5. SOUNDBITE (English) Chuck Daulson, Englishman living in Spain for 23 years, 51-year-old bar owner:

"We don't know how we're going to be now, we might have no pension, we might have no medical, we may have to sell our properties, we've lived here for a lot of years, we don't know how it's going to affect us anymore."

6. Various of Sarah, no last name given, serving customers in bar

7. SOUNDBITE (English) Sarah, 28-year-old Londoner living in Benidorm for 3 years, waitress:

"I've got my mum to vote on my behalf for me, I voted 'in' obviously. If we leave the EU, then it's bad on us expats who live here, obviously we'll lose our medical care, we'll lose our right to work without a work permit. Me and my boyfriend, we've lived here for 3 years, we won't get a chance to get a mortgage or anything like that now."

8. Various of people watching the news on TV at a terrace bar

9. SOUNDBITE (English) Julianne, (no last name given), 75-year-old English tourist in Benidorm, retired:

"We want to control our borders and make our own decisions, and for my grandchildren I think it would be better that we're on our own."

10. Various of newspaper stand

11. SOUNDBITE (Spanish) Gemma, (no last name given), Benidorm native working in the tourism industry:

"We make a living out of foreign people, I think 80 percent of tourists coming here to Benidorm and all the coast around are English."

12. Shot of tourist post at the beach

13. SOUNDBITE (Spanish) Gemma, (no last name given), Benidorm native working in the tourism industry:

"We think it can affect us a lot in our business, in the work that we do, so we're concerned about what can happen, and yes we're a little bit scared."

14. Various of Sterling vs Euro currency exchange sign being changed in the street

British residents in Spain were among those watching the EU referendum result closely on Thursday as the UK voted on whether to remain within or leave the European Union.

Spain has one of the largest communities of British people living abroad, with around 300-thousand Brits officially registered as residents.

It is also a key holiday destination for British tourists.

In the seaside resort city of Benidorn, which has a vibrant British community of around 3,500 people, Brits expressed their concerns on Thursday about what a 'Leave' vote would mean for local British residents and tourists, with a possible weaker pound being a key worry for some.

Most people were going out as usual and most clubs didn't broadcast the TV specials on the referendum, although early after polls closed in Britain some people were seen watching the results in at least a couple of bars in the area of Levante Beach.

The British expat community in Spain is split between those who can vote and those who have lived away from Britain for longer than fifteen years, disqualifying them from a say on whether the UK remains in union with their adopted country.

Many of them are afraid of the consequences of a potential Brexit for their status in Spain, which would depend on negotiations between the EU and the UK should the 'Leave' side triumph.

British residents in Spain were among those watching the EU referendum result closely on Thursday as the UK voted on whether to remain within or leave the European Union.

Spain has one of the largest communities of British people living abroad, with around 300-thousand Brits officially registered as residents.

It is also a key holiday destination for British tourists.

In the seaside resort city of Benidorn, which has a vibrant British community of around 3,500 people, Brits expressed their concerns on Thursday about what a 'Leave' vote would mean for local British residents and tourists, with a possible weaker pound being a key worry for some.

Most people were going out as usual and most clubs didn't broadcast the TV specials on the referendum, although early after polls closed in Britain some people were seen watching the results in at least a couple of bars in the area of Levante Beach.

The British expat community in Spain is split between those who can vote and those who have lived away from Britain for longer than fifteen years, disqualifying them from a say on whether the UK remains in union with their adopted country.

Many of them are afraid of the consequences of a potential Brexit for their status in Spain, which would depend on negotiations between the EU and the UK should the 'Leave' side triumph.

Benidorm - 23 June 2016

++NIGHT SHOTS++

1. Various of coast promenade in Benidorm

2. Close of Union Jack bunting

3. Various of nightclubs

4. Television screen showing news programme on EU Referendum

5. Louise Bell, 42-years-old, UK-born but has been living in Spain for 19 years, watching television programme on EU referendum

6. SOUNDBITE (English) Louise Bell, born in Nottingham but has been living in Spain for 19 years:

"I believe that it's not going to make much difference if we come out of the Euro (sic.). I think everything will stay more or less the same as it was 19 years ago; it's just that you would have to have a work permit to come over to Spain, which I think is more safer for the people travelling around, people with no papers will be more controlled. And my vote is out, because I'm English and I think I deserve, for my country, for my family, that they get the best from their own country."

7. Jim Lions and his wife, UK tourists, watching television coverage

8. SOUNDBITE (English) Jim Lions, 58-years-old, UK tourist in Benidorm:

"I have not voted because I've been here in Benidorm on holiday."

9. Close of Jim Lions

10. SOUNDBITE (English) Jim Lions, 58-years-old, UK tourist in Benidorm:

"I vote we stay in because it's good for a lot of British, could be a lot of problems if we go alone, it's good for companies, the company I work for we deal all over Europe, so it's very good for us."

11. Close of sign reading "Titanic Bar"

12. Bar customers having a drink and watching television coverage

13. SOUNDBITE (English) Denise Wood, 60-years-old, UK tourist:

"I voted by proxy before I came away, I voted to come out of the EU and I don't think that our country benefits from the EU, and I don't think that the politicians know what to do with the country."

14. Various of bars in Benidorm

British residents in Spain were among those watching the EU referendum result closely on Thursday as the UK voted whether to reamain a part of, or leave the European Union.

While one of the largest communities of British people living abroad with around 300,000 Brits officially registered as resident, Spain is also a key holiday destination for British tourists.

In the sunny seaside resort city of Benidorn, which has a vibrant British community of around 3,500 people, beachgoers expressed their concerns on Thursday about what a 'Leave' vote would mean for local British residents and tourists, with a possible weaker pound being a key worry for some.

The British expat community in Spain is split between those who can vote and those who have lived away from Britain for longer than fifteen years, disqualifying them from a say on whether the UK remains in union with their adopted country.

Many of them are afraid of the consequences of a potential Brexit for their status in Spain, which would depend on negotiations between the EU and the UK should the 'Leave' side triumph.

Some of the British people holidaying in Spain expressed their oppinion about the referendum.

British residents in Spain were among those watching the EU referendum result closely on Thursday as the UK voted whether to reamain a part of, or leave the European Union.

While one of the largest communities of British people living abroad with around 300,000 Brits officially registered as resident, Spain is also a key holiday destination for British tourists.

In the sunny seaside resort city of Benidorn, which has a vibrant British community of around 3,500 people, beachgoers expressed their concerns on Thursday about what a 'Leave' vote would mean for local British residents and tourists, with a possible weaker pound being a key worry for some.

The British expat community in Spain is split between those who can vote and those who have lived away from Britain for longer than fifteen years, disqualifying them from a say on whether the UK remains in union with their adopted country.

Many of them are afraid of the consequences of a potential Brexit for their status in Spain, which would depend on negotiations between the EU and the UK should the 'Leave' side triumph.

Some of the British people holidaying in Spain expressed their oppinion about the referendum.

Benidorm - 23 June 2016

1. Various of beach in Benidorm

2. SOUNDBITE (English) Karen Maining, 50-years-old, UK-born but has been living in Benidorm for 23 years, translator and teacher, cannot vote in the referendum:

"I'm unable to vote because I've lived here over the 10 year period, which makes me a permanent resident of Spain, but I'm obviously British born"

3. Beach

4. SOUNDBITE (English) Karen Maining, 50-years-old, UK-born but has been living in Benidorm for 23 years, translator and teacher, cannot vote in the referendum:

"I think a lot of people are very scared to leave; they'd like to leave but they're scared for the one reason that they live in Spain. I think the majority here that can vote would vote for in, because they're scared that they would have to leave. Again, that's a shame, because that's lack of information. You know, I don't think ... Spain does very well out of tourism, and I don't think in any instance would Spain want to lose the tourism that it has."

5. British tourists seated on a bar terrace

6. SOUNDBITE (English) Donald George, 71-years-old, Englishman traveling as tourist in Benidorm, voted 'Remain' via postal vote:

"If we leave the EU, I'm sure that the rate of Sterling against the Euro would … "Whooosh" (gesturing upwards with hands)…. It would explode, we couldn't afford to take our holidays in Europe anymore".

7. Various of Becky and her daughter playing on the beach

8. SOUNDBITE (English) Becky (no surname given), 25-years-old, from Leeds, housewife, voted 'Remain' via postal vote:

"I've postal-voted in for the sake of our country to be united and safe and welcoming to all".

9. Various of beach

10. Crowds drinking at bar