I think there is a lot more to this than the difference twixt R and MR versions of the Mighty Hunter.
It 's been explained that the MR was positioned at Waddo to avoid the expected weather. Why Waddo?, could it be that the powers are carrying out a proving trial? If a SAR sortie west of the Hebrides can be carried out successfully from a centrally located airfield then what is the point in maintaining a fleet of similar aircraft at the end of a very long logistics supply chain that is quite often affected by adverse weather?
What's that noise? could it be the death knell sounding for Ice Station Kilo?