requiring some careful engineering so as not to affect the radiation pattern adversely. † Monochrome initially, colour TV service started September 1967. April 1970 - 1 November 1982 † Monochrome initially, colour production at BBC One Wales started 9 July 1970. 1 November 1982 - 4 January 1983 Channel Four launched across the UK. Being in Wales, Wenvoe transmitted the S4C variant. 4 January 1983 - 3 January 1985 The 405-line BBC1 Wales service on Band III from Wenvoe was discontinued early. The off-air 405-line relays at Abergavenny, Carmarthen and Llanelli had been decommissioned the previous year. This left Llandrindod Wells (and Wenvoe's indirect off-air relay at Llanidloes) and Kilvey Hill as the last surviving 405-line BBC Wales transmitters classed as relays of Wenvoe. 405-line transmissions from Kilvey Hill and Llanidloes were due to shut in the second quarter of 1983, leaving Llandrindod Wells to continue alone until January 1985. 3 January 1985 - 15 November 1998 The 405-line VHF television system was shut down across the whole UK, and until the start of digital television services, Wenvoe's TV output was 625-lines on UHF only. Analogue and digital television 15 November 1998 - 3 March 2010 This was the initial roll-out for digital television using the DVB-T system. The transmitter frequencies and power outputs were chosen not to interfere with the UHF TV channels, but to be received with the same aerial-group. The QAM constellations and number of carriers were changed around 2002 after the collapse of ITV Digital as the service was taken over by the Freeview consortium. 3 March 2010 – 31 March 2010 Analogue BBC Two Wales on channel 51 closed after 45 years of service, and HTV Wales was moved from channel 41 to that channel for what would be its final month of service. Multiplex 1 from channel 30 was renamed BBC A and moved to channel 41+ (which had just been vacated by analogue HTV Wales). In addition to the power increase to 100 kW ERP, it was reconfigured to 64QAM and 8k carriers, which resulted in a service area similar to the old analogue transmissions but with much more bandwidth available than Multiplex 1 ever had. For the duration of the switchover, all the channels carried on Multiplex B were duplicated on this new PSB1 multiplex. Channel 30 was re-used for Multiplex C, freeing Multiplex C's old allocation at channel 43- Digital television