Labour's Rosena Allin-Khan has won the Tooting by-election in a contest overshadowed by the murder of MP Jo Cox.

Dr Allin-Khan held the south London seat for Labour after London mayor Sadiq Khan stood down following his victory in the City Hall race in May.

The A&E doctor, who increased the Labour majority, used her acceptance speech to pay tribute to Mrs Cox, who was killed in her Batley and Spen constituency on Thursday.