The main runway at Brooklands isn’t there anymore. There is a small strip, but AFAIK it was only used once, to get the Vimy replica to the museum (and by a Piper Cub a couple of weeks prior to that, it was the same pilot, he wanted to familiarise himself with the strip). See this video:
http://www.youtube.com/watch?v=hHPe79Bhvb4

As for the Vanguard, the engines haven’t been run much lately due to some starter problems, but the intention is to have them running again in the near future.

Edit: I thought we had a topic on this not too long ago, but I cannot find it anymore. The search only turns up stuff from 2005 and before. Tech issues perhaps?