Index of choirs

Is there an index of UK choirs, members of Making Music or otherwise, anywhere on the site. If yes, how do I add my choir to it? I am particularly interested if there is a list of choirs/contact details for the North West of England.

I'm not sure if this is what you're looking for, but there is the Find a Group tool here:

This lists all member groups (along with the info we have on their type, genre and location) for members of the public to search.