I can just imaging the NT Stazi at Dover's ferry terminal wanting access to tourist's cameras challenge photos of the White Cliffs or pay a fine. Yup, welcome to rip-off Britain. I'll wait for the cease & desist letters to be aimed at Flickr.
Only done it once, myself. About 3 summers back, under a shady tree on a glen coming back from the Cairngorms. It was an early afternoon stop, the midges and other bugs were out in force in the glen, so I stopped and had a siesta.
With little air movement, it wasn't quite a sweat-box, but was getting close. I don't recall if I was whistling tunes from "Bridge on the River Kwai", but it did the job until the day got cooler and the evening breeze came up. I then struck the tent and moved on to a pitch closer to the trailhead.
I can't recall if that was one of the occasions that I had to use microporous tape over the inner's zip-ends to completely seal the inner from the flying/biting hordes.
I've got a Primus Gravity system and thought it great for the reasons mentioned, Pete. But after some hiking I wanted something that'd fit inside my cook system, so I got the Micron. Stability is an issue, but a solvable one if careful.
I hope we all take care when dealing with fire. Maybe it is something that we city-dwellers might forget. Most of my cooking at home is done via electric. I've not found a portable lightweight microwave cooker yet.
I did a few trips with it around Glen Ey with it, but the lightweight solo tent just freed me. The Akto in my case.
I keep the Illanos for tent-free friends. Last time it was used was at Derry Lodge. I'd forgotten how much bigger the footprint was - my mate spent far longer than me clearing the ground of tree cones.
I've not used the Vango, but I think it gets a good write-up from users.