H! by Henry Holland.
Henry says that his collection for Debenhams is all about the "London-girl" look, mix and match pieces and being a individual. A bit of rocky and a bit of vintage. I think this outfit is quite...the London-ish girl look. I might need to remind myself to head into the city and buy some of his clothesXD.
Update: ZOMFG! Thanks so much for 5th place! Thank you to the Debenhams Team and of course Polyvore :))