There are two "Les Senteurs" shops in London; one close to Sloane Square, the other close to Marble Arch (Google for the maps). I have only been to the Sloane Square shop. It is quite small but stocked with a huge variety of niche and harder to get fragrances. The staff are friendly and helpful without being pushy. They let you get on with smelling stuff without constantly pushing you to buy something. They do not stock many mainstream brands but do have some real jewels. The web site is most informative. I would recommend anyone to make a visit. Better to go by tube, by the way.