easyJet use the MPL and Virgin Atlantic have announced the launch of one. I believe BA Cityflyer run an MPL through FTE.
BA do have some of their simulators at Cranebank but capacity is an issue at the moment so the FPP cadets and guys coming off the 737 will do Airbus type ratings at CTC.
Ground school class size of 60 people certainly is a myth. When I did my ATPLs there were 17 people I think. I've said before that I dislike a lot of things about CTC, especially the manner in which they treat their customers and in some cases staff. I found the flight instruction to be generally very good, and the ground school teaching to be mostly good, with some classes of excellent teaching and some of very poor teaching.
The organisation in New Zealand is very poor compared to the UK operation, the weather in Hamilton is exceedingly frustrating for both trainees and instructors which leads to a lot of flight cancellations and a lot of wasted time.