Environmental activists squatting at the Grow Heathrow site in Sipson are set to be evicted on Friday.
Bailiffs are due to arrive at Vineries Close anytime from 8am onwards.
Around 20 people have been living in tents and dorm sheds on the proposed third runway site for just over four years.
They were told last month about the eviction following a lengthy appeal against landowner Imran Malik's application to have the land returned to him.
"The owner hasn't really made any dialogue with us," says Eddie, who lives at the site.
"Hopefully the bailiffs will see a community resource and not evict us.
"We're providing a resource which people all across London use."
Grow Heathrow still hopes they can buy the land from Mr Malik.
On Thursday, talks and workshops offering advice on how to peacefully resist the eviction will be held.
Activists from the Transition Heathrow, a group campaigning against the proposed third runway, moved onto the former market garden site in March 2010.
They say they removed 30 tonnes of rubbish from the land.
Art, craft, fruit and vegetable growing, and bicycle maintenance are just some of the classes held at the site.
Landowner Imran Malik served the group an eviction in September 2010, which the group appealed.
In July last year, Mr Malik successfully applied to the Central London County Court to have the land returned to him, but in a unprecedented move, Judge Karen Walden-Smith granted a stay of eviction and leave to appeal to the Court of Appeal.
However, Grow Heathrow was not granted legal aid so could not pursue the battle any further.
getwestlondon.co.uk will be at the site on Friday when the bailiffs arrive, to bring you live updates.
