Would fitting diffusers to the exhausts like we did on the Gazelles and Lynx's not help avoid the winter strikes? im guessing - but surely the temperature difference at the zero layer would be as sensitive as a heat seeking missile - therefore the lower the signature you can paint the less likely hood of creating the static source and flashpoint??
Clearly low level is the better option but normally at a comms cost and no doubt frowned upon for some ludicrous reason by those assuming your a loose cannon and war hero or poser...!!
Can you north sea drivers decide your own level subject to conditions or is your flying and levels as restrictive as airways for plank drivers?
I have to say it is a very interesting topic especially the difference between over water and land ops vis-a-vis weather....