ITV's service was provided from the Arfon transmitting station, approximately 20 miles to the south on the mainland.

In 1967 the site became the area's main station for 625 line colour UHF TV, starting with just BBC Two in June of that year.

On Wednesday 21 October 2009, the Llanddona group of transmitters underwent the first stage of the Digital Switchover and on Wednesday 18 November 2009, analogue television was finally turned off from Llanddona and its group of transmitters as it underwent the second stage of the Digital Switchover.

Whilst the old analogue channels were in the UK UHF C/D aerial group, the new DVB channels are now spread over into the E group (presumably to avoid co-channel interference with Winter Hill transmitter), meaning that some customers may need to replace their aerial to get optimum reception.

The coverage area consists of the majority of Anglesey, and a wide range of other parts of the North West Wales coast.

From 1958 onward, many households in these counties would point their outdoor aerials towards the Irish sea and could receive transmission from this transmitter.

Oddly, BBC research report 1963-50[4] does not mention a start date though it does point out that co-channel interference (presumably from Divis in Northern Ireland, about 180 km to the northwest across the Irish Sea) was "severe".

This caused the transmitter's useful service area to be smaller than planned, and forced the building of the Holyhead relay.