It was originally built by the BBC, entering service in mid 1970[1] transmitting the now-defunct 405-line VHF television system.

UHF television was added to the site in early 1975,[2] launching with just the three programme services that were active at the time.

BBC 405-line television started up with the site acting as an off-air relay transmitter of Wenvoe about 60 km to the east, near Cardiff..

405-line television was shut down early compared with the UK as a whole, and Llanelli's Band I transmitter ended its service after a mere 12 years.

The UK's digital switchover commenced, mirroring the changes taking place at the parent transmitter at Carmel.