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.

Fifty years ago this month, we lost one of the greatest musicians of all time. Jimi Hendrix died in Notting Hill, on 18 September 1970. Johnny Allen Hendrix was born on 27 November 1942 in Seattle. He became “Jimi” only later. He had a diverse lineage with African-American and Native American roots. His grandmother Nora was said to be one-quarter Cherokee. Early 20th-century photos reveal her fine features, which bear a striking resemblance to those of her grandson.