NickWi
Guru
Big +1 for the Northwave winter boots. I rode throughout last winter with just a pair of standard Merino socks underneath. I just never got cold feet no matter what the weather was.North wave Arctic are my current choice. Very toasty, and the neoprene collars help with keeping the feet dry.
https://www.wiggle.co.uk/northwave-flash-arctic-gtx-winter-boots/
This will be my second winter’s use out of them, they are holding up well so far.