Granted Freedom of the City of London in 1993, I have often been asked whether I had ever exercised my right to herd sheep or cattle across London Bridge. This ancient privilege to bring animals into the City without payment of tolls had long since been abandoned when the livestock markets closed and in any case was of no special importance once the gates and a single river crossing were replaced by the modern landscape we all know today.

In 1866 the Blue Plaque scheme was founded by the Society of Arts and so this year they celebrate their 150th anniversary. Now managed by English Heritage, London's blue plaques are handmade in Cornwall by the Ashworth family. The first blue plaque was awarded to the poet Lord Byron in 1867, but his house in Holles Street, was demolished in 1889 – today it is the site of John Lewis department store.