A total of 27 people have been held as part of activity in London, Gloucestershire, Oxfordshire, Devon, Essex, Manchester, Surrey, Sussex, Norfolk and West Yorkshire.

All the individuals were arrested under a section of the Public Order Act which makes it illegal to conspire to disrupt national infrastructure.

On Tuesday, four people were arrested after being identified at Gatwick Airport. They have been released on bail.

On Thursday evening, six people were arrested at an east London community centre as part of a publicly advertised event promoting airport disruption.

Among those held were several high-profile members of Just Stop Oil who we believe to be key organisers.

This morning, Met officers worked with more than eight other police forces to arrest suspects at their homes across the country. A total of 17 people were arrested.

Chief Supt Ian Howells, who led the operation, said: “We know Just Stop Oil are planning to disrupt airports across the country this summer which is why we have taken swift and robust action now.

“Our stance is very clear that anyone who compromises the safety and security of airports in London can expect a strong response from officers or security staff.

“Airports are complex operating environments which is why we are working closely with them, agencies and other partners on this operation.”

All those released on bail are subject to conditions which include not travelling within 1km of any UK airport unless passing through by vehicle or public transport.

In future, anyone suspected of breaching this condition can be arrested immediately for this offence.