UHF in the UK is Band IV for channels 21 -37, Band V for channels 38-68. Antennae are grouped according to which set of channels your local transmitter uses. Wideband antennas are common but give less gain. Most antennas are some variant of a multi-element yagi. Log periodic antennas seem to be getting more popular. They give a flatter response and cleaner polar diagram than a yagi.
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