UK people - online yarn shop recs?

[jackandahat]

I moved just before Christmas and the new house is brilliant in every way... except it's not near any yarn shops! I have a John Lewis, and that's it. So I'm looking to order online for the first time.

Do any of the UK knitters here have personal recs for good places to buy yarn online? I've found various options on Google, but I'd like to go with something I know is good. At the moment I'm mostly looking to buy sock yarn. I'm on a budget but willing to save up, and stuff like "Free shipping over £25" is great because I'm willing to buy a bunch at a time.

Thank you.