The new £10 is the second plastic or polymer note issued by the Bank of England and features a portrait of Jane Austen. It follows the introduction of the first polymer note in September 2016, a fiver with a picture of Winston Churchill and an extract from his famous speech: ‘I have nothing to offer but blood, sweat, tears and toil.’ The new twenty-pound note, with a portrait of a young J. M. W. Turner and a version of his painting of the Fighting Temeraire in the background will be released in March 2020. As yet no decision on a polymer fifty-pound note has been made and who would feature on it.

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.