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").
John Tate (Lord Mayor of London) John Tate (Lord Mayor of London) Sir John Tate (died 1515) was twice Lord Mayor of London and a Member of Parliament. He was born the son of Thomas Tate of Coventry and became a mercer of the City of London, initially apprenticed to his uncle, John Tate, a former (1473) Mayor of London. John Tate junior was made an Alderman of London in 1463, appointed Sheriff of London for 1485 and elected Lord Mayor for 1496-97 and 1514–15. He was twice elected, in 1504 and 1510, as a Member of Parliament for the City of London. He was knighted