means that strong radio and television signals from that region (BBC North West and ITV Granada) can be received in North Wales, and strong Welsh signals can be received in North West England also. In the days of analogue TV, some people who received signals from the Llanddona transmitter, but who had no interest in S4C (a Welsh speaking channel) were known to erect a second aerial and receive Channel 4 from Winter Hill instead. The transmitter signals were also received across the Irish sea in many parts of the east and south east coast of the Republic of Ireland, mainly in counties Dublin and Wicklow. From 1958 onward, many households in these counties would point their outdoor aerials towards the Irish sea and could receive transmission from this transmitter. When cable television launched in the early 1970s, the Welsh BBC and ITV stations were provided on the cable platform as these channels were mainly received in the Dublin and Wicklow counties. Services listed by frequency Analogue television January 1958 - 3 June 1967 it is unclear when transmissions began. "The Big Tower" claim that 405-line television from Llanddona started in January 1958, and the entrance plaque to the transmitter building certainly agrees that the mast and its building were built in 1958. Oddly, BBC research report 1963-50 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. "405 Alive" counter-claim a very precise date of 15 May 1962 for the start of 405-line television. 3 June 1967 - 6 September 1973 The first UHF transmitter at the site entered service. 6 September 1973 - 1 November 1982 HTV's transmissions certainly started on 6 September, but is likely that the BBC1 Wales UHF service had already commenced before then. 1 November 1982 - January 1984 Channel 4 launched across the UK. Being in Wales, Llanddona transmitted the S4C variant. January 1984 - 15 November 1998 The 405-line VHF TV transmission was discontinued after 22 years of service. Analogue and digital television 15 November 1998 - 21 October 2009 21 October 2009 - 18 November 2009 The BBC2 analogue signal was switched off after 32 years of service, and