[citation needed] UHF television was added to the site in late 1975,[3] launching with just the three programme services that were active at the time.

In 2014 the UK telecommunications regulatory Ofcom decided that the 700 MHz band should be cleared of digital television to be used for mobile broadband services by the summer of 2020.

[6][7] BBC 405-line television started up with the site acting as an off-air relay transmitter of Wenvoe about 90 km to the south, near Cardiff.

About 42 km south there is the 700 m ridge to the east of Pen y Fan which obstructs the line-of-sight, but the off-air signal was good enough, as evidenced by the BBC's 1963 report on long-distance rebroadcast links[8] (see map on page 8).

Llandovery relay had been built a year earlier in 1968, and as can be deduced from the geometry of MB21's photos,[9] it was indeed chosen for the signal source.

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

From the outset, Llandrindod Wells radiated the BBC's three FM radio services, acting as an off-air relay of Wenvoe.