Unbelievable.
Did it not occur to the senior officer who decided on this new paint scheme that it just makes the TriStar a more identifyable target. Surely the best defence against somebody taking a pot shot at an RAF TriStar would be to make the aircraft look as much like any other civil airliner as possible.
I am also reminded of the HS125 air defence grey fiasco - they changed from white to grey and then found the avionics were overheating.