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Channel 1 in Britain & New Zealand & channel 0 in Australia were in the mid 40 Mhz part of low band (band 1). London's Crystal Palace transmitter blasted 200 KW's of ch 1 to South East England. Ch 1 was also used in Northern Ireland in the Belfast area & Cornwall in South West England.
All of the High power low band (band 1) transmitters in Britain used vertical polarization & most (but not all) medium & low power ones used horizontal polarization. they did this to try & reduce co-channel interference which was a big problem at the time.
VHF TV on 405 lines was gradually shut down in the early 80's & the last transmission was in January 1985. Most people stopped using VHF TV in the early 70's as the old 405 lines only TV's wore out & were replaced by 625 lines UHF only sets, also colour was only broadcast on 625 lines UHF..
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