[6] From 1994 to 1996, Pidgeon was a political researcher for Rose Colley, a councillor on Southwark London Borough Council.

She was employed at Croydon Health Authority as a communications manager from 1999 to 2002, and undertook the same role at Guy's and St Thomas' NHS Foundation Trust from 2002 to 2006.

[6] In the 2008 London Assembly election, Pidgeon was selected as the Liberal Democrats' candidate for the Lambeth and Southwark constituency; she came second to Labour's Valerie Shawcross.

[10] At the 2010 general election on the same day, Pidgeon unsuccessfully stood in the Vauxhall constituency, finishing in second place.

In the 2013 New Year Honours, Pidgeon was appointed a Member of the Order of the British Empire (MBE) for public and political service.

[13] Pidgeon promised to focus on housing, affordable childcare, air pollution and public transport.

[14] She emphasised the need to ensure that workers can live in the city by using rent control and reducing public transport costs.