the welsh are backing up traffic in a protest agains high gas prices... The demos are timed to coincide with the fifth anniversary of the refinery blockades of 2000, when protesters brought much of Britain to a standstill. I actually remember that vaguely, people were pissed.
however, i can't help but be a little concerned. this is a pretty inefficient thing to do, creepy traffic burns a lot of gasoline (or diesel) and releases noxious fumes, etc. i do admire their cheekiness, though.