Polling stations have opened across south Oxfordshire to elect a new MP for the area.

There are 12 runners in the Henley by-election, prompted by London Mayor Boris Johnson standing down from the Commons.

Seeking to defend the seat for the Tories is Oxfordshire county councillor John Howell, challenged by international development charity chief executive Stephen Kearney for the Liberal Democrats, who were in second place at the 2005 General Election.

Labour's standard bearer is Richard McKenzie, a marketing manager.

The other candidates are:

Mark Stevenson (Green)

Timothy Rait (BNP)

Derek Allpass (English Democrats)

Harry Bear (Fur Play Party)

Dick Rodgers (The Common Good)

Louise Cole (Ind)

Amanda Harrington (Ind)

Bananaman Owen (Monster Raving Loony)

Chris Adams (Ukip)