Support for Ukip has surged to 25% according to a new poll for the Mail on Sunday.
The research puts both Labour and the Tories on 31% while the Liberal Democrats get the backing of just 8% of respondents.
Douglas Carswell, who defected from the Conservative party and won back his seat as a Ukip candidate, has been introduced to the Commons.
As Ukip prepares to enter Parliament for the first time, leader Nigel Farage reflects on his party's byelection successes.
Ukip has its first elected MP after Douglas Carswell took almost 60% of the vote in the Clacton by-election.