Mayor

To run for the position of Mayor of New York against Democrat Mark Green in 2001, Bloomberg gave up his position of CEO and appointed Lex Fenwick as CEO in his stead.

In 2008, Fenwick became the CEO of Bloomberg Ventures, a new venture capital division and Daniel Doctoroff, former deputy mayor in the Bloomberg administration, was named president and CEO, serving until September 2014.

At that point, it was announced that Michael Bloomberg would be taking the reins of his eponymous market data company from Doctoroff, who was chief executive of Bloomberg for the past six years after his term as deputy mayor.

Greater London has 33 London Boroughs (neighbourhoods) and a mayor.

The old City of London is only a square mile in size but has its own Lord Mayor.

The Governing Mayor of the city is Michael Müller (SPD).