Labour has apologised to the voters of Rochdale for not fielding a candidate after the by-election triumph of George Galloway, who the party warned will stoke “fear and division”.

Keir Starmer’s party said Mr Galloway “only won because Labour did not stand”, after it dropped its candidate - Lancashire County Councillor for Nelson East Azhar Ali - for suggesting Israel was complicit in Hamas’ October attack.

Mr Galloway, one of Britain’s most divisive politicians, swept to victory in the Greater Manchester seat, gaining almost 40 per cent of the vote in a contest mired in chaos and controversy and dominated by the Gaza conflict, on a turnout of 39 per cent.

The former Labour and Respect MP, who now leads the Workers Party of Britain, took aim at the Labour leader in his victory speech focused on Palestine.

He said: “Keir Starmer, this is for Gaza.

"You have paid, and you will pay, a high price for the role that you have played in enabling, encouraging and covering for the catastrophe presently going on in occupied Palestine in the Gaza Strip.”

Lancashire Telegraph: Azhar Ali was dropped by Labour after comments he made about IsraelAzhar Ali was dropped by Labour after comments he made about Israel (Image: Lancashire County Council)

He also declared “Labour is on notice” and a “shifting of the tectonic plates” away from Sir Keir’s party.

Labour had been expected to win the by-election triggered by the death of Labour MP Tony Lloyd, but its campaign was thrown into disarray by a leaked recording of Mr Ali’s inflammatory remarks about Israel, seeing Mr Galloway become the firm favourite for the seat.

Labour's Hyndburn parliamentary candidate Graham Jones has been suspended as a result of his comments at the same meeting, where he said "f****** Israel".

Mr Ali remained listed as the Labour candidate as the party’s decision came too late for ballot papers to be changed.

After the by-election result, a Labour spokesperson said: “We deeply regret that the Labour Party was unable to field a candidate in this by-election, and apologise to the people of Rochdale.

"Galloway only won because Labour did not stand.”

Lancashire Telegraph: Reform UK's Simon Danczuk, from Hapton, lost heavily in the by-electionReform UK's Simon Danczuk, from Hapton, lost heavily in the by-election (Image: PA)

Ellie Reeves, Labour’s deputy national campaign co-ordinator, said: “George Galloway is someone who stokes up division and fear.

"This isn’t how we would have wanted this by-election to play out.”

Asked if Labour would have lost to Mr Galloway even without the controversies, Ms Reeves said she could not “talk about hypotheticals,” saying the party was now focused on selecting a candidate for the general election.

She also suggested Labour would not change its position on the Middle East war, calling for an immediate humanitarian ceasefire.

Left-wing pressure group Momentum said Sir Keir’s “failure to stand with Gaza in its hour of need left the door open for George Galloway”.

“To avoid any more damaging repeats, Starmer should end the factional abuse of Labour’s selection processes and stand up for an immediate, permanent ceasefire in Gaza," it added.

Lancashire Telegraph: The results in RochdaleThe results in Rochdale (Image: PA)

Mr Galloway’s majority of 5,697 votes amounted to 18.3 per cent of the total, on a turnout of 39.7 per cent, a little higher than the two recent by-elections in Wellingborough and Kingswood where Labour turfed out the Tories.

The surprise runner-up was David Tully, a local businessman and independent candidate, who secured more than 6,600 votes.

The Rochdale campaign was beset by controversy and claims of intimidation and divisive tactics.

Reform UK’s leader Richard Tice claimed his candidate, former Rochdale MP Simon Danczuk, had received a death threat during the campaign and said his party’s campaign team had been subject to “daily intimidation and slurs”.

Recriminations continued after polls closed, with Mr Tice alleging “menacing behaviour” had featured throughout the campaign and questioning the validity of the postal ballots returned during the contest.

He said: “This by-election and result should act as a serious wake-up call to those in power and indeed to the entire electorate.

“We are supposed to be a beacon of democracy, this shameful contest has been more characteristic of a failed state.”

The party’s candidate, Mr Danczuk, from Hapton, represented the seat for Labour but was barred from standing for the party in 2017 after he admitted sending “inappropriate” messages to a 17-year-old girl.

Mr Danczuk secured a little more than six per cent of the vote, coming sixth behind Mr Ali, the former Labour candidate.

Independent candidate William Howarth agreed with Mr Tice that there had been an “element of intimidation” during the campaign.

But Mr Galloway denied his supporters had engaged in any intimidation, and claimed Mr Tice had invited him to be a Reform UK candidate in a recent by-election.

A spokesperson for the charity Campaign Against Antisemitism said: “George Galloway has an atrocious record of baiting the Jewish community.”

They added: “Given his historic inflammatory rhetoric and the current situation faced by the Jewish community in this country, we are extremely concerned by how he may use the platform of the House of Commons in the remaining months of this Parliament.”