I have the impression there's a general assumption that in the UK people just won't get enough exposure to sunlight because of the fears over cancer, working indoors (particularly during the winter when they may not even get outside during daylight other than occasionally at the weekend) etc. Summers like this year's probably don't help much either. They've not been suggested to me, but I still have "tidemarks" around my ankles where I got a tan this year, so perhaps the doctors look at me and think I probably get enough sunshine as it is
James