As you can see it is a small one with nothing on the mast except the transmitting aerials (top) and the receiving aerials directed towards the Sennybridge relay about 2 miles away. I think it's at the end of a long chain of relays feeding each other from the Wenvoe main station.

I think this relay at Trecastle is quite unusual in that there are no mobile phone aerials on it in this very rural setting.