Age is all in the mind - after all look at Elizabeth she was 27 going on 50.
Whereas I, and several others on this site, may be a little older, but we could still show the young folk a thing or two!!!!
I shouldnt think they would get many applicants over 40 anyway - unless they were self-employed they would be unlikely to get 9 weeks off work unless they gave it up and most wouldnt be able to do that.
Just hope they dont restrict themselves to young 20 somethings though I think they need to have a range of ages so we can see how they interact.