Mr N,
I am sure you are right but whatever the (usual) lousy contract said the boys and girls at the coal face had to do with an increasingly unserviceable 'K' fleet.
My only contact with the 'J' came as a member of the HEART when we visited Abbey Wood for the day The team there were very cagey about the 'J' and it did not inspire us with confidence By the time the 'J' came into service I had already left having already been extended for a year to do the HEART job.
As the RAF was the 'J' launch customer I think that Lockheed could have shown a bit more respect ! Perhaps I am being very naive !