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Electoral registers are usually compiled in the latter part of the year. Compiling of registers was suspended during the duration of The First World War so the register compiled in the latter part of 1918 would be the first one for four years and the first one which enfranchised all men over the age of 21. Prior to 1918 not every man had the right to vote so would not be included on earlier registers (approximately 2 out of 3 men from 1884 to 1918 could vote). In 1918 some women for the first time appeared on electoral registers for general elections, but not all women over 21 until 1928. Electoral registers only contain those who had the right to vote at the time and who also chose to register for voting, so not necessarily everyone living at a particular address.
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Valda