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Setting clocks to Titanic time

Tsk-tsk. Titanic mythology - already? They can't even get the times right (News, June 1).

The time of the commemoration of the launching was totally wrong. In 1911, there was no standard time in the British Isles - only local times.

At 12.13pm in Belfast, Big Ben would show 12.36pm (GMT) - Belfast being some 23 minutes behind London, due to some five degrees-plus of longitude west.

Then (now) add another hour for British Summer Time (unheard of until the Kaiser's war of 1914). To get it right, the commemoration should have been at 1.36pm (12.13pm in Belfast in 1911).