I’ve had a Integral Designs Unishelter which I bought in Mountain Equipment CoOp in Calgary in 1994. It’s been all over the Rockies with me, and a fair few mountainous locations in the UK. The single hoop design keeps fabric off your face and there’s a fly net over the opening aswell as the fully breathable layer so you can stargaze without fear of Mozzie bites. If you can find a dealer in the UK or can import from somewhere, I’d definitely give it a try.
Mine at Pumlimun
EDIT: Oh just a note to say that I always used mine with a 3/4 length lightweight Thermarest and a hollow fibre bag. Fleece liner if REALLY cold. Some of the best nights sleeps I’ve ever had, and I’ve spent about 300 nights in it.