As it happened: Clacton and Heywood by-election results

Key Points

• UKIP's Douglas Carswell wins the Clacton by-election with a majority of 12,404 to become party's first elected MP
• In his victory speech, Mr Carswell - who defected from the Conservatives two months ago - says of his new party "there is nothing we cannot achieve"
• Liz McInnes wins Heywood and Middleton by-election to ensure Labour hold the seat, but the party's majority is slashed by UKIP, which finishes 617 votes behind