ACTRESS Emma Thompson and impressionist Alistair McGowan have bought land in Sipson in a bid to stop expansion at Heathrow.

The land, half the size of a football pitch, was bought by the stars who are part of a Greenpeace coalition.

The group has pledged to put a spanner in the works of possible expansion at the airport, and said they would fight any attempts to buy the land by compulsory purchase.

The Government is expected to make it's decision on Heathrow expansion within days.