Very familiar with OAA Gatwick (used to be GECAT) -as I recall its got a lot of Thales devices in its training cells - and a lot of them go back to my time at Thales Training and Simulation ie quite old
CAE have a very fine and very modern training centre just down the road from my house (if I lean over the garden wall I can almost see it) so now they have an older training centre in Gatwick. Competing with Alteon Gatwick offering training.