The following is copied from the Greenpeace website at this address: http://www.greenpeace.org.uk/

"We've bought a piece of land slap bang in the middle of the proposed third runway site at Heathrow. We’re not going to let the runway get built and we need your help. The government plans to go ahead with airport expansion across the country even though this means we'll have no hope of meeting our climate emission targets. Tackling climate change means stopping airport expansion and we need you to join the plot.  We've bought the land with Oscar winning actress Emma Thompson, comedian Alistair McGowan and prospective Tory parliamentary candidate Zac Goldsmith. Sign up now to get your own piece of the plot. It's not a financial thing, but you will be included as an owner on the legal deed of trust."

You can sign up via the Greenpeace website and become a 'beneficial owner' of the land.  It is hoped that having thousands of such owners will help stop the runway being built.