You should definitely check out nail supplies 24/7, they've got looooads of different coloured nail gels:-
UV Colour Gels | Nail Supplies 24/7
Also standard soak offs too:-
Soak Off UV Gels | Nail Supplies 24/7
But have you seen the prices?!!!!
I just found the make-up training academy. The owner is Cristine Bleakley, the make-up artist who did daniel craig for 007 movies etc! So cool!
here's a link to their page:- Make-up Training Academy London
I actually commented yersterday about the nails and beauty academy, if you want to go on an affordable practical nail course, rather than a DVD, then you could check them out:- Nail Courses | Nails and Beauty Academy