When I posted the question I had not really thought about it, but, having asked on a couple of BBs it is amazing just how many old ac we and other air forces around the world keep going.
Other ones include the B52s and KC135s in the US and I was reading about upgrades to Turkish F4s... though probably not on the same sqn all that time they are certainly getting on a bit.
As Archimedes said though... not that many have kept the same airframes they started with like 10 Sqn have.
Tonks
