Created by Leeds City Council's parks and countryside service, the garden features two 12ft (3.6m) high lock gates and a mock canal.

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It involved moving mountains and eradicating disease and inventing and constructing by far the hugest locks and lock gates ever conceived at the time and even a 1914 General Electric computer system to run it all.

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He was killed as he got out of his car to lock the gates of their premises in Moy, County Tyrone.

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Gates returned home to find his key wouldn't work because his lock was jammed.

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