Essential winter clothing?

I need winter gloves. I bought these

https://www.wiggle.co.uk/dhb-deep-winter­-flt-glove
they did not work last night.

Castelli do a nice but a bit pricey range with primaloft gold.

The Spettacolo have been pretty decent below freezing when working a little hard but do have annoying hard line of stitching on the palms, so worth trying on. It's begging to soften up with time, they are otherwise brilliant. The zip is also a great feature for getting them on/off very easily.
https://www.sigmasports.com/item/Castelli/Spettacolo-RoS-Gloves/YQGM?s=1

Pricy, but just work;

Rapha Deep Winter gloves for me. Busted mine out for the first time this year and they worked perfectly during a five hour ride this morning in the Scottish snow.

Last year I was recommended the Endura Primaloft ProSL gloves (you can get them in an MTB variety too, I just found a pair in my local Evans).

To me, they're very impressive. Once your core warms up, it seems like they do too. I have experienced some of the issues mentioned in the reviews on Wiggle (liners being pulled out with your hand) but overall I'm very happy for the days of the year I have to use them.