I can highly recommend a guy called Nando (Italian) who has just opened his own salon with two other stylists on Lavender Hill having left the Bulgari Hotel in Knightsbridge. Nando is super talented and has done hair for Kylie and many other celebs, he's also a very talented make up artist too.
He is amazing at make overs and the new salon is beautiful - relaxing and the nicest I've been to in this area. Their prices are really reasonable (he was £250 a cut and blow dry in Knightsbridge) but I think around £50 over here, not surprising some of his clients now come South of the river.
Their number is 02072237716 and website
www.gnjhairstudio.co.uk - prices on website.