Good steak restaurant in central London?

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It's my birthday next month and the missus is treating me to a meal. So I am after a good steak restaurant, not too pricey as on a budget really but want as good as we can get. One condition though it must be a tastecard restaurant.

I have had a look through the Tastecard website and there's loads on there but some are hit and miss.

Does anyone know of any good steak restaurants?

 

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Flatiron website about as useful as can be. No menu, no details, nothing. Annoying