tuc,
I am sure that we always referred to Marshalls as the DA for Europe in respect of the C130K. We could of course have been parroting nonsense, but Marshalls seemed to act as a DA in respect of most things to do with the 'K'. The tanker comes to mind when fatigue data was required in respect of repeated overweight take off operations. I have a vague (all my recollections are so !) notion that the rushed initial Chinook buy threw up the question as to who would be the UK DA as Boeing refused to be.