Genghis - RTFQ! Which school at Old Sarum runs "either a modular or integrated ATPL course"?
Ghandou - Cabair (Bournemouth) operates as a separate school to Cabair (Cranfield), although they are part of the same Organisation and have the same Head of Training.
AFAIK, if you enrol at Bournemouth none of your training is done at Cranfield. The only other school around there that offers a complete ATPL course (i.e. CPL(A), MEP, MCC and ATPL Theoretical Knowledge) is CTC but they do a lot of their flying in New Zealand and their theoretical knowledge is sub-contracted to BGS as distance learning.
You will be able to complete some, but not all, modules at Bournemouth with the likes of BCFT, PAT, MCT, etc.