Is there good Chinese food in London.

OK it's our own fault for not doing research first. We were in London last week, but where are the good Chinese restaurants? We tried mightily to avoid Chinatown, but succumbed finally. One dim sum place was not that bad. One place that advertises that they just hired a BBQ chef from HK actually had very good BBQ duck. But otherwise no.

So for the next time we are in London, where are the good Chinese restaurants?