I like these places but luckily have been too a few other places and tasted some great food. Please see my Top 5 below.
Worlds End Market: Meat or Fish in high quality in this old pub. A good experience within a good venue. The drinks menu is also up there and you could easily stay after dinner to soak up the atmosphere.
Vicino Restaurant: Home made Italian style cooking, with a signature dish of Lobster Linguine. Garlic is there in abundance and it is all about simple cooking done well.
Big Easy: The Home of the American BBQ in London and the UK. This site is one of the originals and brings you big platters of seafood or smoked meats. The lunch time deals are also well worth a try.
Restaurant Gordon Ramsay: My first time experiencing a 3 star Michelin restaurant and it was good. I am not sure if it is worth the price, but I didn't pay. Go for the full service and being treated like a mini celebrity. The food isn't too bad either.