Hurrah for Biyoni - a fabulously great hairdressers with a friendly family feel. It's the only hairdressers I've ever been too where I know all of the friendly staff by name, where there's nothing they won't do to please and they go out of their way to make sure you're satisfied.
As I was so confident about their ability I asked them to do my hair for my wedding day last year - they especially opened the shop for me (I got married on a Sunday) and it was a joy to spend the morning with Nicola and Nadia and obviously to have beautiful hair for my wedding.
You can see why they keep their clients - family feel, not outrageous prices despite being on the edge of London - even if I move in the future I'll definitely be travelling back to this hairdressers. Once you find a good one like this you'll never change!!