John,
I too would like to see the US style historics scene in the UK. Unfortunately, the TGP is a bit too cut-and-thrust for most of us. There are some (notably Duncan in the Williams) that do both series. For the most part, however, we prefer to race the cars at about 90% or so of capability (which is pretty quick BTW) and at a bit more for some. We still race but the camraderie is more important. For those who missed the earlier link:
http://historicgrandprix.com. There are some fantastic photos from each event.