Newly elected Labour councillor Lee Scordis says he believes his party can replicate his success in Colchester at the upcoming General Election in five weeks time.
Mr Scordis took the Abbey division seat from the Liberal Democrats by a majority of 155 to secure his seat on the County Council.
These Local Elections are being seen as a barometer for how things could turn out on June 8, and Mr Scordis is confident that Labour could cause a shock by taking the seat from the Conservatives' Will Quince.
"We're making great strides in Colchester and our membership is over 1,000," he told ITV News Anglia.
"There's a real chance that we could become the real opposition to the Conservatives as the Lib Dems continue to slide."
On the whole in Essex, it has been a good night for the Conservatives who have retained overall control of the County Council after reaching the 38 seats required to form a majority.
Only two of the six counties in the Anglia region have so far declared results but the Conservatives are making the early running.
The Chairman of Colchester's UKIP branch has defended the party after a poor showing in this year's local elections.
Just under a quarter of residents in Peterborough have cast a vote for the newly-created post of Mayor of Cambridgeshire and Peterborough.