Richmond Park has been represented by Zac Goldsmith, who lost to who in the 2016 London mayoral election?
Richmond Park (UK Parliament constituency): Richmond Park is a parliamentary constituency which has been represented in the House of Commons since 2017 by Zac Goldsmith, of the Conservative Party. Zac Goldsmith:  He was the Conservative Party candidate at the 2016 London mayoral election, which he lost to Sadiq Khan of the Labour Party.
Sadiq Khan