The Conservative candidate, Chloe Smith, has won the Norwich North by-election with a majority of 7,348.
She received 13,591 votes, with the Labour candidate in second place on 6,243 and the Lib Dem candidate in third with 4,803.
Labour had previously held the seat with a majority of 5,459, which means there was a swing to the Conservatives of 16%.
Chloe paid tribute to her predecessor, Dr Ian Gibson, who she described as a “strong, independent, local voice”.
But she stressed that the by-election had been "a victory for honest politics”, with the people of Norwich North electing to "vote for change”.
Chloe, who is 27-years-old, will become the youngest MP in the House of Commons when she takes her seat.