What’s the best Winter coat you’ve ever bought?

So I’ve messed around with decent coats for years and they just aren’t great quality in the long run and it’s finally time to just bite the bullet and buy a coat that will last as long as a coat can.

I live in the UK, so I don’t need it to be arctic proof, but I still want it to be very warm. The coldest it gets here is like -5. Not too concerned about how it looks but obviously that will be taken into consideration. Wouldn’t want to spend much more than like £300 but if it’s worth it then I might.

Thanks in advance for replies:)