There was also NGTE, subsumed into RAE in the early 1980s I think.
Yes it was with the Royal Aerospace Establishment
RPE (Rocket Propulsion Establishment) Westcott, which became part of Royal Ordnance by '92; don't know what it's called now.
Yes should of remembered Westcott since I have been there
but I'm sure they moved a lot of the resources up to spadeadam (don't count me on that) for blue streak missile/rocket.And I think some of the Royal Ordnance comes under BAE.