Lord Mayor of London been mandatory for election to the Lord Mayoralty. Two Sheriffs are selected annually by Common Hall, which meets on Midsummer's Day for this purpose. By an ordinance of 1435, the Lord Mayor must be chosen from amongst the Aldermen of the City of London. Those on the electoral roll of each of the City's 25 Wards select one Alderman, who formerly held office for life or until resignation. Now each Alderman must submit for re-election at least once in every six years. The Lord Mayor is then sworn in November, on the day before the Lord Mayor's Show ("see below").
William Leighton (Lord Mayor of London) May that year. Leighton was listed as one of the governors of Christ's Hospital in 1825. Leighton died at Kemnal House in Kent, in 1826. He had previously lived in Charlton. William Leighton (Lord Mayor of London) Sir William Leighton (1752 – 23 April 1826) was a British shipowner and merchant who served as the Lord Mayor of London in 1806. Leighton's family was from County Durham in the North East of England and he moved to London around 1779 following his father's death. Leighton worked as a coal merchant shipping coal from the port of Newcastle, and was based