Thanks for taking the trouble to provide a write-up.
Thanks too for the reminder about the solar cycle beiing a nagging worry for this winter in the UK. But I like to take solace in 1990-1. That winter was similarly just starting the downward slope from the peak of a cycle (and with a sunspot number double what we have at present). Yet it saw a memorable winter, with snow, storms and snow again with severe frost. Hundreds of thousands without power, water supplies cut off and extreme traffic disruption.
The Feb. cold was thanks to the Russian high extending westwards, the one thing you might not expect if it were true that solar activity at this stage of the cycle powers up the jet.
http://www.meteociel.fr/modeles/archives/archives.php?day=8&month=2&year=1991&hour=0&map=1&mode=0
2 miles west of Taunton, 32 m asl, where "milder air moving in from the west" becomes SNOWMAGEDDON.
Well, two or three times a decade it does, anyway.