She has since been elected chair of the London Assembly 's Housing and Planning Committee .
Gavron ceased to be deputy mayor on 4 May 2008 following Boris Johnson 's victory in the 2008 London mayoral election .
Gavron has since been elected chair of the London Assembly 's Housing and Planning Committee .
Gavron ceased to be deputy mayor on 4 May 2008 following Boris Johnson 's victory in the 2008 London mayoral election .