Jayne,
Perhaps not surprisingly everyone so far has recommended what they bought, but I doubt if anyone has tried out the three or four popular makes on the same van - something useful that the UK caravan clubs should do?
Well, the German ADAC (like the UK AA and Caravan Club in one organisation) did exactly that test and published it on their web-site (in German of course)
The summary was that Truma rated first, closely followed by Reich, then the others a bit or further behind.
To read the full report you need to be a member of ADAC, maybe that's something the UK caravan clubs could do - recently ADAC have reviewed and ranked caravan tyres and stabilisers. I think most of us would like to know which caravan tyre offers the best value, performance and safety - so why don't the UK clubs arrange to buy the article and publish it?
Robert