I remember Shattered (the show where they had to stay awake) and Space Cadets! Also Touch The Truck was on around the same time, although that was Channel 5.
I seem to remember there was a bit of backlash to Shattered and they never did it again. It was cruel.
Does anyone remember the original Eden on Channel 4 in the early 2000s? It was the start of Rav Wilding’s career. My sister and I were absolutely obsessed with that show. It was a precursor to Shipwrecked & I’m A Celeb:
https://en.m.wikipedia.org/wiki/Eden_(2002_TV_series)
Another one I think of sometimes, although it was much more recent, is Big Ballet - a docu series about larger people joining a special ballet. I always thought Wayne Sleep was a bit
crappy to them, kept saying nasty things and then claiming they needed to toughen up.