I have copied below from an email sent out by Sarah Clayton who is our local AirportWatch Coordinator.  This is a first chance to protest against a third runway.  I expect there will be many more.

Flash Mob at T5 on Saturday

In protest against the decision, on Saturday 17th January at midday (on the dot!) hundreds of people are expected to converge on Heathrow Terminal 5 (Departures concourse) to stage a colourful Flash Mob where the campaigners will all reveal red t-shirts emblazoned with the words Stop Airport Expansion.   If you don't have a printed T shirt, any red shirt or red garment will do!    Just don't reveal the red till 12 noon precisely.     More details at:   www.t5flashmob.com  
 
Do attend if you can, and tell any friends, relations, neighbours and colleagues who might also be interested.
 
Best wishes 
Sarah Clayton