Strangely - none of the RN exchange chaps we had on SAR actually went back to the Senior Service once they had seen the light
Most of the RN QHI students I had were doing the QHI course to avoid going to sea
We used to do deck landings (to all grey funnel liners) as RAFSAR aircraft on an ad hoc basis and just treat them like any other SAR situation - it was the RN who got all rule-bound and officious so I was sent to be standardised by RN Standards so I could cascade the training down through the RAFSAR Force.