From UK Campsite forums the Coleman Canyon seems a good choice - easy to put up, spacious. Have found it for under £100 on the web.

Unfortunately they don’t seem to sell it at Attwools or Cotswold Outdoors or Blacks, so I’m not sure where we could see it “in the flesh”.

In fact, looking at the dimensions with Jack here, we prefer the Vango, it is symmetrical and slightly more spacious, particularly width between fly and inner - always a good thing!

Also, it is a British company...