UHF TV in England...

[Colly0410]

When UHF became de facto normal here in UK there were lots of areas that had poor reception compared to VHF, so they built many relay stations: These would usually be on a hill or high ground & receive a signal from a main station & re-transmit it on another channel, usually with vertical polarisation to reduce co-channel interference. In some mountainous areas they'd have relay stations relaying another relay station. There were a few places where they'd have a daisy chain of relay stations relaying one after another, what/where the longest daisy chain was I don't know...