have recently been considering going to Europe for ATPL and eventually work
CATS (Cranfield Aviation, now based in LUton and Gatwick) is probably cheapest in UK for DS ATPL course
If you intend working in the UK at the end of all this, for Ryanair/Easy/TCX/J2etc, I would have a very close look at how
CAE Oxford might be able to help you, and not necessarily go for the cheapest. I speak from experience.