Local government in London recent organisation, having been set up in 2000 to replace the similar Greater London Council (GLC) which had been abolished in 1986. The headquarters of the GLA and the Mayor of London is at City Hall. The current Mayor of London is Sadiq Khan who was elected in 2016, replacing Boris Johnson, who served two terms. Health services in London are managed by the national government through the National Health Service, which is controlled and administered in London by a single NHS Strategic Health Authority called "NHS London". The 33 local authorities are the 32 London borough councils and the
Lord Mayor of London Mayor has been chosen from amongst the Aldermen of the City of London. The Lord Mayor is elected at Common Hall, comprising liverymen belonging to all of the City's livery companies. Common Hall is summoned by the sitting Lord Mayor; it meets at Guildhall on Michaelmas Day (29 September) or on the closest weekday. Voting is by show of hands; if, however, any liveryman so demands, balloting is held a fortnight later. The qualification to stand for election is that one must have served as a City Sheriff and be a current Alderman. Since 1385, prior service as Sheriff has