Char siu, the Cantonese style glazed roast pork, has the the right flavour, and is of the appropriate cut. It's not the absolute best of its kind (have had slightly fattier versions, with a more exquisite glaze), but it's damn good for what it is.
Wontons are also very good -- plump shrimp, cooked just right. A nice flutter of the skin that reminds one why the name translates to "swallowing clouds."
Got them with the dry stewed noodles (lao1 mian2) in a pleasant braising sauce, slightly sweet with dark spices -- noodle could be more al dente but that's being nitpick.
The soup that come with it isn't bad too; not the standard shrimp soup (it might be pork bones).
Standard drink is a respectable jasmine from loose leaves.
For the budget minded, nearly all noodles are under £5 (just a handful between £5-6 among the dozens).
Makes me want to check out the other places in the area.