BBC1 analogue was moved to channel 63. Multiplex 1 on channel 50 was also discontinued. The new "BBC A" multiplex took over on channel 57 which had just been vacated by BBC1 analogue with its full post-DSO ERP of 20 kW. BBC A is an expanded version of the BBC's multiplexes 1 and B (with several channels, such as BBC Four and radio stations temporarily available on both BBC multiplexes). Digital television 18 November 2009 - 14 November 2012 All the remaining analogue TV was discontinued, and the new post-DSO multiplexes took over their frequencies plus a couple of new ones. Frequencies above 800 MHz were not re-used as these will be reassigned to 4G mobile phone services. 14 November 2012 - present As a side-effect of frequency-changes elsewhere in the region to do with clearance of the 800 MHz band for 4G mobile phone use, Llanddona's "Arqiva B" multiplex was moved from channel 50 to channel 40, and "D3&4" on channel 60 gained a negative frequency offset. Aerial group: W Polarisation: horizontal Analogue radio 1960 - Early 1990s VHF FM radio was in service by October 1960 as evidenced by a BBC research report. Early 1990s - present Radio 1 got its own frequency and National Radio 4 was added to the set. Additionally, the frequencies for the original three services were increased by 200 kHz each. Digital radio See also List of masts References External links MB21's page on BBC 405 TV to Wales and the West 405 Alive's list of transmitters" More details on 405-line BBC transmitters The Transmission Gallery: Llanddona Transmitter photographs and information The Transmission Gallery: TV Coverage Map The Transmission Gallery: FM Coverage Map Llanddona Transmitter at thebigtower.com Buildings and structures in Anglesey Transmitter sites in Wales Llanddona