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Rishi Sunak has insisted the next general election is not a “done deal” after losing two safe Tory seats but narrowly holding on to Boris Johnson’s old constituency in three by-elections.
Labour won in Selby and Ainsty and the Liberal Democrats in Somerton and Frome, both overturning majorities of about 20,000 in what polling experts said spelled “deep electoral trouble” for the Tories.
But the Prime Minister was not changing his approach, vowing to “double down” on his existing policies to win over the public as he seized on a slender victory in Uxbridge and South Ruislip.
The Conservative leader was spared becoming the first prime minister since 1968 to lose three by-elections on the same day by holding on to the west London seat.
Labour blamed the Ulez charge on high-pollution vehicles being expanded in the capital by its own mayor Sadiq Khan for losing out by 495 votes.
New Tory MP Steve Tuckwell’s majority is hugely down on the one secured by the former prime minister in 2019.
In Selby and Ainsty, 25-year-old Keir Mather will become the youngest MP in the Commons – the “Baby of the House” – after overturning a 20,137 majority.
He secured a 4,161 majority in the North Yorkshire seat and Labour said it was the biggest majority the party had ever overturned in a by-election.
The swing from Conservatives to Labour of 23.7 percentage points is the second largest swing managed by Labour at a by-election since 1945.
Mr Sunak celebrated the one piece of good news after a bad night by visiting the Rumbling Tum Cafe in Ruislip with Mr Tuckwell.
The Prime Minister told broadcasters: “By-elections, mid-terms for an incumbent Government are always difficult. They rarely win them.
“The message I take away is that we’ve got to double down, stick to our plan and deliver for people. That’s what I heard when I was out on the doorsteps and that’s what we’re going to do.
“We’re going to work incredibly hard to deliver on our five priorities and earn people’s trust for the next election.”
He argued holding on to the seat showed there was hope for the Tories at the general election expected next year.
Mr Sunak said: “Westminster’s been acting like the next election is a done deal. The Labour Party has been acting like it’s a done deal, the people of Uxbridge just told all of them that it’s not.
“No one expected us to win here. But Steve‘s victory demonstrates that when confronted with the actual reality of the Labour Party, when there’s an actual choice on a matter of substance at stake people vote Conservative.”
Labour said that a similar swing across the country as seen in the by-elections would result in the party winning more seats than in Tony Blair’s 1997 landslide.
Leader Sir Keir Starmer said: “This is a historic result that shows that people are looking at Labour and seeing a changed party that is focused entirely on the priorities of working people with an ambitious, practical plan to deliver.
“Keir Mather will be a fantastic MP who will deliver the fresh start Selby and Ainsty deserves.
“It is clear just how powerful the demand for change is. Voters put their trust in us — many for the first time. After 13 years of Tory chaos, only Labour can give the country its hope, its optimism and its future back.”
For the Lib Dems, a 29.0 percentage point swing in Somerton and Frome saw a 19,213 Tory majority turned into a 11,008-vote cushion for new MP Sarah Dyke.
In a victory visit to Frome, Lib Dem leader Sir Ed Davey said the result showed his party was once again winning votes in its former West Country heartland.
“It’s time to end this shameful spectacle. It’s time for a general election to end this Conservative circus,” he told supporters.
The victory means Sir Ed has become the first party leader since Paddy Ashdown in the 1990s to win four by-elections.
Despite Labour’s success in North Yorkshire, the failure to secure victory in Uxbridge and South Ruislip in west London has led to a blame game among senior figures over Mr Khan’s plan to expand the ultra-low emission zone (Ulez) to cover outer boroughs.
Labour candidate Danny Beales had distanced himself from the policy, saying it was “not the right time” to expand the £12.50 daily charge for cars which fail to meet emissions standards.
The defeat in the seat was dubbed “Uloss” by a party insider in a sign of the unease at Mr Khan’s plan.
In his victory speech, new MP Mr Tuckwell said Mr Khan had cost Labour the seat.
“It was his damaging and costly Ulez policy that lost them this election,” he said.
“This wasn’t the campaign Labour expected and Keir Starmer and his mayor Sadiq Khan need to sit up and listen to the Uxbridge and South Ruislip residents.”
Deputy Labour leader Angela Rayner and shadow justice secretary Steve Reed acknowledged it had been a factor in the campaign and called for Mr Khan to change course.
Mr Reed told the PA news agency: “I think those responsible for that policy will need to reflect on what the voters have said and whether there’s an opportunity to change.”
Polling expert Professor Sir John Curtice said the by-elections suggest the Tories are in “deep electoral trouble”, with the results showing the Conservatives are 21 percentage points behind, similar to the national polling.
He noted the similarity to the run up to the 1997 Labour landslide, telling BBC Radio 4’s Today programme “history is not bound to repeat itself” but the precedent indicates the difficulty the Tories are in unless they can turn things around.
But he said Labour must ask why its hold on the electorate is “apparently so weak” that when a local issue like Ulez comes up they “don’t perform as they should”.
For Mr Sunak, the defeats happened as MPs drifted away from Westminster to begin their summer break, so he may be spared a clamour against his leadership.
The Prime Minister could attempt to reset his administration with a Cabinet reshuffle in the wake of the contests – Defence Secretary Ben Wallace has already signalled he will exit the Government, so there is a vacancy to be filled – although No 10 has publicly said there are no plans for a shake-up.
Mr Sunak may have decided the benefits of freshening up his team at this stage would be outweighed by the risk of it being perceived as a panicked response to an electoral setback.
No 10 said he will be in Westminster, working in Downing Street on Friday.