London is an amazing town: Eccentric, Fashion, a la mode, Open-minded, Style…are the watchwords! Don’t be surprise that most of the new designers target London to first show their collection. 

When I arrived in London I bought the Time Out for Fashion in London. I do advice this book if you want to shop here! It is full of addresses and fashion tricks.. From my point of view, Oxford Street and Regent Street are the worse places to shop in London! Why? First of all it is too crowed (tourists) and you can’t really enjoy London! So if you have time, I suggest you to go: 

•  Notting Hill, Ledbury road - Anya Hindmarch, Reiss, Paul&Joe, Shoes etc
• Notting Hill, Westbourne Grove -  Paul Smith’s house, Comptoir, Jigsaw, Twenty8twelve, Mulberry, Zadig etc
• Notting Hill, Portobello Road – the most famous market in London - Apple Tree, Criminal, American Apparel etc
• Sloane square – go futher on Kings road (it’s like Oxford Street, same shops + All Saints, more posh, smaller and less touristic)
• HighStreet Kensington –Topshop, Zara, Miss sixty, gap H&M, Massimo Dutti etc…
• Campden Town – you have to go through the shops in this punky market ;). There are always a treasure or some nice vintage clothes
• Bricklane’s market – same thing as the above
• Harrods! NO! - Harvey Nichols or the Selfridges are nicer! YES 

Exceptions

• Near Regent Street on the Vigo street – Abercrombie & Fitch (Interesting concept?! and ouah the salesmen)
• Near Oxford Street I would rather go to South Molton Street – Kurt Geiger, Reiss, Jigsaw etc Etc. 

Hope it will help you! I live in Notting Hill, thus I prefer this neighbourhood ;)