Well, you do actually have a China Town in Birmingham. If I do remember, it's located on and around Hurst Street. I'm not a Brummy, BTW, so don't hold me on the specific location.

After that, you should be able to find China Towns in Liverpool - Merseyside, Duke Street, Manchester - Faulkner Street, Newcastle upon Tyne. More further North, is Scotland. Edinburgh and Glasgow. They are all that I am aware of.
Edit: Sheffield has no official Chinatown although London Road, Highfield is the centre of the Sheffield Chinese community.
