If you notice a problem with a particular record on the trigpoint database, please use the contact admins link on the relevant trigpount details page. This will enable the admins to more easily respond to your query.
If you wish to report a bug, or request a new feature, you can do so on the issue tracker. For some feature requests, it may be worth starting a discussion on the Trigonomy mailing list, to get a group concensus on the best action to take.
Alternatively, you can use this form to send an email to the T:UK admins.