HWD: cheers, thanks - and I think I will do all QNH this weekend and probably from now on.
tmm: I am based at Wycombe.... so Filton a bit of a trek compared to Cranfield which only takes ~15min to get to. But, once I get the rating I think I will make a point of doing a couple of approaches at Filton on the way back from Land's End trip I am planning with a mate (also IMC rated so we can safety-pilot for each other) - cheers!
Andy