Right, time to see what ive learned over the last few weeks of watching this develop. Ill make a statement below and you can tell me if im being overly simplistic with my thoughts.
Going back a week we had charts that showed the greenland high in close proximity to out NW shores, indeed some were concerned that it was too close and would force the beast to track too far south with us missing the closest air. Over the last few days it would seem the GH has changed position and alignment allowing the beast to score a direct hit but at the same time progress westerly at a faster pace. This fast pace of travel may now lead to an easier ingress of low pressure warmer air into the south as the main thrust of cold air has accelerated through into the atlantic leaving a chink in the flank so to speak.
That could be tosh but it will help me to get some feedback.