This site is built by mySociety. You can read more about us and why we do this. Most of the site is Copyright © UK Citizens Online Democracy. The source code is available under an open source license. We want you to use it, tinker with it, have fun with it.
Our database of local councillors is kindly supplied by GovEval. Postcode lookup is done using MaPit, our tool for doing that sort of thing, and uses Ordnance Survey open data behind the scenes. Thanks to them both!