But the thing is, high risk shifts according to what's being driven at.
Would somebody with chronic asthma but under 35, and therefore considered low risk on a H&S sheet, be considered an underlying condition in the stats if they were to suffer worse from it? Would someone with high blood pressure, where it's considered to be under control? Should you, therefore, move them to high risk, stop them going to work and tell them to work from home, as opposed to opening further up their job and placing them further into face-to-face contact with people who are younger still?
I would say someone with Chronic asthma whatever age is high risk and suggest they WFH if possible and minimise risk by avoiding large indoor/confined space gatherings (supermarkets). Probably different advice than I’d have for a person under 35 without any health conditions
Same with high blood pressure ie provide better protection for them. I don’t know if having it ‘under control‘ makes any difference if you get Covid, but if it was me or a member of my family, I’d recommend the same as above