The popularity of dim sum outside of the Chinatown bubble has been steadily increasing in the last decade thanks in part to the diversification of Londoners' palates and the rebranding of the offering to appeal to a wider audience
Fans of Chinese cuisine will appreciate that most Chinese restaurants in places like Chinatown serve a distinctly Cantonese style of regional food. There are in fact 8 great regional cuisines in China
If you ask the local Chinese community where is the best Chinese restaurant in London? I would guess 90% would say Royal China
Nightclubs where you normally enjoy magnums of Champagne aren't normally places where you expect top quality dim sum, but Fu Manchu is an exception to the rule.