of course agencies have a monopoly on 'attractive girls'

I use agencies for 23-29 (imo that's where they beat aw) and aw for all younger and older, I haven't really bothered with the website agencies for a while as I find they're not doing well with new talent recently, plus never seen them get the really hot sp's, mainly 7s with the odd 8-8.5
Since op specified British, aw is a solid bet for all ages. Personally I get the feeling its harder to find new young British stunners but coping with a mix of sa and aw, feels scarce everywhere, even looked at tinder the other day and think I swiped right like 1%