Yeah I know you weren't Stew. It is a fair distance to go, but boy it's worth it.
For me the ring trip is just as much about the track as it is the social side of things. It would be boring to go on your own, but then when your there its epic... Once you go you will realise the UK tracks are average at best.
Yeah I've been to Cadwell a couple of times, it's nothing special, very stop-starty, hard on the car & doesn't really flow that well. I much prefer donnington if I had to choose a UK track. The track flows nicely, plenty of undulation too. All in my opinion of course