Heathrow (East) Sat 31 May. Road disruptions - henry k
A spring carnival of resistance to airport expansion at Heathrow

The following is a sample of web info

"31st May 2008 12:00pm to 06:00pm We can stop the runway! We will stop the runway!
Stop the third runway at Heathrow! Stop Heathrow expansion! Stop the runaway growth in aviation! Tell the government to get real on climate change and prevent a climate catastrophe! "

"Start time 12.00 noon. Assembly point Hatton Cross (Picadilly Line tube station). There will be a a carnival-style march to a festival-style event at Sipson (the village which will be destroyed if the 3rd runway goes ahead). This will include the creation the world's biggest "NO" - spelt out in human bodies. "

BAA details
tinyurl.com/3zfc26

So anyone in the Heathrow area beware of probable delays.
If you need some local info re alternate routings ask soon.
Heathrow (East) Sat 31 May. Road disruptions - drbe
Might be wise to use the Western Perimeter Road.

As the BAA link says, the Eastern perimeter road will be affected.
Heathrow (East) Sat 31 May. Road disruptions - Steve Pearce
I was wondering what the matrix signs on the M4 were referring to.