I'm pretty certain that in the UK, there is nothing. There should be, and I've been whingeing about this for years, but there isn't.
Also it's doubtful that any university would recognise your ATPL exams towards a degree qualification. The nature of the learning and examination is extremely different to the university system that it's very hard to cross-qualify. That said, some institutions may take your ATPLs in lieu of all or (more likely) part of the more traditional degree entry requirements: A-levels and the like.
For a distance learning degree in aviation however, I'd recommend that your best bet is to look at what's available from
Embry Riddle in the USA; the BSc in
Professional Aeronautics might be the sort of thing that you're after.
Best of Luck,
G