NATS Flying training nowadays is only for those streamed to Airports (ie Aerodrome or Approach). If you are streamed Area (as is most likely!) then there isn't any flying training in the syllabus. However, if you are lucky enough to be streamed to Airports then you will get 15 hours at either Hurn, Wycombe or Manston. The flying is done between the end of the Basic Course and the start of your next course. This means that you lose a weeks holiday, but for 15 hours of free flying and additional ground school it's gotta be worth it!!
Regards ADIS