Like TinC I get cold extremities. This winter I’ve splashed out. For gloves GripGrab Optimus for a 5 fingered version, ok down to freezing for me with liners. That lot was £127 from Wiggle. For lower temps still, the GripGrab Nordic Lobster. Those I got (just) pre-Brexit from LordGun in Brescia, Italy. They’re listed as £48 now, but only the XL available and no idea if they’ll ship to UK.
For me feet the Lake MXZ304 boots, more like ski than cycling boots, but effective on my perennially cold feet. Not toasty all day sub-zero effective, but ok for me for 1 1/2 sub-zero hours. A snip at (gulp) £237 from Saltdog cycling.