I found this webite and cannot see where they are based. Anyone know? http://pepes-kitchen.co.uk/home/catering/
Their Facebook page indicates Portobello Road in London (why are so many London roads referred to as "the" Portobello Road?), but it seems to be more of a pop up type place so final address may vary.
I am not too sure it is 100% legit. Not even tripadvisor has a single mention I can find. It seems to be a supper club of same description, with no known phone number, or address. Contact is made by e-mail only.......... Bit weird.........