"Enter Elaine Louie, a New York Timesstaffer who writes on food, design, and style. What better person to suss out the spots where the most stylish of Londoners dine while staying solvent? Tracking down leads from architects, curators, designers, and other sources with discriminating taste and exacting palates, Louie profiles fifty venues that would be considered great finds at any price and where a meal (not counting tip and beverage) can be enjoyed for less than $25. The restaurants range across ethnicities, and include a substantial number of traditional British and Continental restaurants. They deliver on decor (cool, charming, and/or beautiful) and the food (not necessarily three-course meals, but sometimes more modern, light dining) is always memorable. Follow the leads of fashionable epicures to- aker & Spice, a chic spot favored by the impeccably dressed yummy mummies, young mothers who savor the best quiches in London and golden-crusted meat pies filled with baby veggies fresh from the British countryside the darling and simple cafe atop four floors of fashion in the hip Dover Street Market, centrally located near Bond Street Crazie Homies in hip Westbour