Here's a nice obscure one - the Coleford MF site. (It's not strictly so called, but we have added the 'MF' to avoid confusion with the Coleford UHF TV relay) It radiates Forest of Dean Community Radio on 1521kHz. FoDR also have a smaller TX at Newent, and I'll send the pics sometime soon.

It's a Radica installation, and is located just outside Coleford on a campsite. It's 200W ERP and it can be heard far afield - I live in Gloucester (about 16 miles as the crow flies) and I can receive it easily on a cheap portable.

The other mast on the site is a non-broadcast communications mast.