cornish-stormrider, I can give you the theoretical answer to 6, the civilianisation/outsourcing is making savings, so we are told, those monetery savings were supposed to benefit the troops, the backside of this is it was also supposed to release more troops from depth maintenance to forward where they are deemed to be required.
Problem with the monetary savings these appear to have disappeared into the black hole of the Government/MOD, and the manpower, these same people decided to save even more by actually getting rid of them instead of using them on the frontline, as they where going to.
With regards to question 7, so what, no civvie company that produces goods works for patriotic reasons i.e. for no profit (or that does not benefit their shareholders, who are expecting a return on their money), not even the NAAFI (despite their protest to the contrary), and rather than waste existing facilities, would it not make financial sense to use them. It costs a lot more to send aircraft to a civvie site (or another RAF one) than it does to use the on station facilities.