Sir Peter Alfred Soulsby is a British Labour Party politician serving as Mayor of Leicester since 2011. He was the Member of Parliament (MP) for Leicester South from 2005 until he resigned his seat in April 2011, in order to contest the new post of mayor. He served as Leader of Leicester City Council from 1981 to 1994 and from 1996 to 1999.

Leicester South is a constituency, recreated in 1974, represented in the House of Commons of the UK Parliament since 2011 by Jonathan Ashworth of the Labour Co-op Party. A previous version of the seat existed between 1918 and 1950. Except for a 2004 by-election when it was won by the Liberal Democrats, Leicester South has been held by the Labour Party since 1987.