Dozens of travellers have pitched up at a development site in Brentford.
Footage from Brentford TV shows a number of caravans and other vehicles have taken over the site formerly known as Twickenham Plating, off Brentford High Street on Monday (February 29).
The group has also pinned a legal warning on the gates saying "This site has been occupied. It is our home and we intend to stay here."
They have also claimed the police have no power to remove them claiming a court order from the county court of High Court will be required to do so according to the Criminal Law Act 1977.
Police officers are in the area monitoring the situation.
Hounslow council has said it is working with Ballymore to resolve the situation.
Hounslow council tweeted on Monday afternoon: "Travellers have occupied Ballymore site on the south side of Brentford High St.
"We're working with Ballymore to solve this as soon as we can."
It has also been reported that a man was allegedly aggressive and swore at an elderly couple who were walking near the site.
Ballymore, Hounslow council and Hounslow police have been approached for a comment.