Eh, even though there is seasonal variance it depends where you shop. If you're not fussy, there are cheaper stores that will sell warm clothes (you won't need massive coats or thermals or anything, just a thick jumper and maybe hat, coat/jacket/fleece and gloves), such as Primark & TK Maxx.
I'm an idiot, got my dates completely wrong. If your original itinerary is correct, I would only be able to have a drink with you on the weekend of 21/2 to 23/2 (Friday to Sunday). I've got a friend's birthday that weekend but I'll be in London on the Sunday anyway (23rd) so that would be my best day for sure.I'd love to have a beer with you.
Chobi and anyone else fancy doing 23rd as well? Could go for lunch and have some drinks afterwards?