Came across this on a walk around the Birkenhead docks. It was fired at one o`clock every day from the waterfront at the Morpeth Dock to enable people to put their clocks and watches right, Started in 1867 and finished 1969.
There was a move to stop it in 1932 due to the operating costs about ?100 per year, and people having radios, but it was kept going. It was also fired to herald in the twentieth century.