Minus 14.5. Actually it did drop to Minus 16. The clock has not been altered yet though.
This was last Sunday morning on the way to the Grouse Fell race. The kind young girl in the Mcdonalds drive thru at Derby was frozen bless her as she handed over my Latte. I told her it was Minus 16. She just said I cannot feel my feet. I replied dont worry I cant feel my fingers.
Thats the coldest Ive known it.