Nine protesters who blocked a road to Heathrow have been found guilty of wilful obstruction of the highway.

The group chained themselves together across the M4 southbound spur road to the airport in August 2015.

A court heard the protest caused “utter chaos” leading to “a huge amount of stationary traffic” southbound.

The nine protesters each denied the charge. They were ordered to pay between £261 and £523 each.

Willesden Magistrates Court heard how four protesters held a large banner across the road and chanted “Black Lives Matter”.

Six others formed a human chain on the ground by linking their arms inside hollowed fire extinguishers filled with wire mesh and concrete, the BBC reported.