In reply to rlines:
Almost in the grand UKC tradition of not answering the question as I won't mention overtrousers, but these were my best buy for commuting through Glasgow winters.
https://www.probikekit.co.uk/sports-footwear/shimano-xm900-spd-cycling-shoe...
So much nicer than putting dirty wet overshoes on over wet cycling shoes to go home after work, write this out 100 times! Haven't used overshoes since.
Slightly damp after a 50min downpour but good enough, non-skiddy vibram sole and look more like walking boots than weird cycling shoes when you wander round shops or go to the pub.
Altura night vision jacket - hard wearing, pit zips are good. The commuter classic but heavy so consider something lighter if you prefer.
Some brilliant irreplaceable Aldi winter jerseys from long ago (brushed fleecy inside, often branded for cyclists as "Roubaix" )
Altura night vision and amazon/ebay cheapo tights (brushed fleecy inside, Roubiax style)
Light rain or drizzle - https://www.wiggle.co.uk/castelli-squadra-long-gilet, water resistant front and mesh back is very good. Weighs nothing.
Altura Night Vision Waterproof gloves, although look at Decathlon. My meshy summer & non-meshy spring/autumn full finger Decathlon gloves are good.
If you are commuting in normal clothes then no idea. Maybe jacket, spare normal trousers at work in case you get soaked and Shimano (or equivalent) boots.
Did I mention the boots enough? They're good, although I can confirm they are not waterproof when level of water goes over the bottom bracket and your ankles go underwater as you pedal.
Mudguards - some people swear by them, I only have bikes with mudguards so I have no comparison.
Wool walking socks.
Post edited at 09:59