London - 5 December 2016

1. Pro-Europe demonstration in front of Supreme Court

2. Tilt down of sign reading (English): "Stop Brexit fight racism and the scapegoating of immigrants. Defend freedom of movement."

3. Various of pro-Europe protesters chanting, holding banners

4. Pan from police to protesters in front of Supreme Court

5. Rival protest groups in front of Supreme Court, police officers at scene

6. Pro-Europe protesters shouting (English): "Brexit is racist, stop Brexit now!"

7. Smart phone screen showing protesters

8. Rival protesters discussing

9. Pro-Brexit protesters, woman waving Union flag

10. Man being led away by police

11. Policewoman

12. Supreme Court and protesters

Small groups of protesters held rival demonstrations on Monday as judges inside the Supreme Court in London were hearing arguments as to whether the government had the right to leave Europe without parliamentary approval.

Britain's Supreme Court began hearing a landmark case on Monday that will decide who has the power to trigger the UK's exit from the European Union - the government or Parliament.

The legal battle has major constitutional implications for the balance of power between the legislature and the executive, and has inflamed Britain's already raw wound over how and whether to leave the EU.

Prime Minister Theresa May plans to trigger Article 50 of the EU's key treaty by the end of March, using centuries-old government powers known as royal prerogative.

The powers - traditionally held by the monarch but now used by politicians - enable decisions about joining or leaving international treaties to be made without a parliamentary vote.