Ten people have been arrested in the UK after protesters blocked the main road to London's Heathrow Airport causing significant traffic congestion.

The protesters are from the group Black Lives Matter, which is holding a number of demonstrations in the UK for the first time.

The group of protesters began their demonstration shortly after 8am by lying down across the five-lane slip road which leads into Heathrow Airport.

Four protesters were arrested and taken to West London police stations.

Another six arrests were made at the scene.

The backlog of traffic into Europe's busiest airport started to clear early this afternoon.

Smaller demonstrations took place at Birmingham Airport and in the centre of Nottingham.

The Black Lives Matter group started in the US as a reaction to the fatal shootings of black people by white US police officers.

The British arm of the group said it aims to demonstrate at the disproportionate number of black people who die in police custody.

The day of action comes just a day after the anniversary of the death of Mark Duggan.

The 29-year-old was shot by police attempting to arrest him in Tottenham, north London, in August 2011, and the shooting sparked nationwide riots.

An inquest jury decided that Mr Duggan was lawfully killed by a police marksman.