Which is the most important clock in the world? Many visitors to London would answer ‘Big Ben,’ even though this is officially the name of the bell behind it rather than the clock itself. However, as a London blue badge guide, I would say that the world’s most important timepiece is the John Harrison H4 which can be seen in the Greenwich Royal Observatory museum near where the Prime Meridian is marked on the ground.

Westminster Abbey is both Britain’s royal and its national church. No monarch has been buried there since 1760, but it was in the Abbey that the funeral service for Diana, Princess of Wales, took place in September 1997, her brother Earl Spencer giving a famous eulogy at this event.

I was once asked to do a walking tour of Croydon, my borough in London and also where the composer Samuel Coleridge Taylor lived for most of his life. He was a man of mixed heritage who studied music and composed the Hiawatha Wedding Feast inspired by Hiawatha, written by Henry Wadsworth Longfellow.