The announcement from Rishi Sunak on 22nd May to call an early July election took most people by surprise, not least members of his own party.
The Conservatives have been lagging well behind in the polls since the mini-budget of September 2022 that brought about the end of Liz Truss's brief premiership, with most commentators predicting the Prime Minister would hold off for as long as possible to hope for some kind of bounce.
But the decision to go to the polls this summer will almost certainly see a comfortable Labour win, and although many leading Conservative MPs have already announced they'll step down at the next election, there are a number of notable names at risk of being unseated.
bet365 have odds on the majority of UK constituencies, and we look at some of the most prominent at-risk MPs below.
Having lasted shy of 50 days as Prime Minister, Liz Truss's tenure as a Member of Parliament may be drawing to an end, with Truss potentially becoming the first former Prime Minister since HH Asquith in 1918 to lose their seat..
Her mini-budget which brought about significant economic problems for the country coincided with her party tanking in the polls, ultimately leading to the general election that will almost certainly see a Labour majority government.
Since her resignation as Prime Minister, Truss has made several contentious media appearances, sharing platforms with Steve Bannon, who in October 2022 was sentenced to four months in prison and the controversial podcast host Carl Benjamin.
It's been reported that Truss has kept a very low profile on the campaign trail and has rarely been seen at length in her constituency. Despite being odds-on favourite to win when the election was announced, the Conservatives are 6/5 to win South West Norfolk with Labour now favourites at 4/6.
While the majority of the most notable MPs losing their seats will be Conservatives, Jeremy Corbyn also faces being voted out of Islington North.
A big odds-on favourite when betting opened, recent polling suggests Islington North will vote Labour once more, as it has in every election since 1937, with Corbyn 6/5 to beat 8/13 Labour.
Member of Parliament for the soon-to-be-abolished constituency of Fareham, Suella Braverman, has a fight on her hands to remain an MP at the upcoming election with the former Attorney General and two-time Home Secretary in danger of losing an overwhelming majority.
Fareham has been Conservative-held dating back to 1885 and is one of the Tories' safest seats (its lowest vote share since 1974 when Labour's Harold Wilson won the election is 47.8% in 1997, when Labour won a landslide), but is at risk of going red at the next election, as Fareham becomes the newly created constituency of Fareham and Waterlooville.
The Conservatives are 2/5 to win Fareham and Waterlooville and Labour are 9/4.
Ahead of a night where we'll likely see many Portillo moments, the unseating of Iain Duncan Smith may well be the biggest.
The leader of the Conservatives from 2001 to 2003, IDS spent a number of years in cabinet positions and has been an MP since 1992. But having seen his majority shrink to just 1,262 at the 2019 election, Labour looks primed to take the seat for the first time.
Initially priced at 1/9, however, Labour have since drifted to 1/5 and now 4/9, with the Conservatives being cut from 11/2 to 3/1 after the Labour Party blocked prospective candidate Faiza Shaheen (who lost by just 2.6% at the 2019 election) from standing regarding posts she liked on her X (formerly Twitter) account.
Shaheen announced her intention to run as an independent, though, and is 9/2 to win.
First elected to North East Somerset in 2010, Jacob Rees-Mogg faces a fight to retain his seat following the boundary changes which will see the seat become North East Somerset and Hanham.
The seat will be partly made up by around half of the former Kingswood constituency, which Labour's Damien Egan won with a 17.5% swing in February 2024.
Labour's representative for the seat will be Dan Norris, a Member of Parliament between 1997 and 2010, with Labour 1/5 (was 4/9) to win and unseat Rees-Mogg, with the Conservatives 10/3 (was 13/8).
Former Deputy Chairman of the Conservative Party, Lee Anderson resigned his post to vote against the Government regarding the Rwanda asylum plan (before ultimately abstaining).
Anderson then had the whip suspended over comments made around Sadiq Khan and Sir Keir Starmer, defecting to Reform UK.
Anderson is set to stand as a Reform candidate in the general election, and has been cut from 5/1 to 6/5 to hold onto his seat following the news Nigel Farage would run in Clacton, with Labour 1/1, and the Ashfield Independent candidate - Jason Zadrozny, who stood as the Ashfield Independent candidate in 2019, coming second behind Anderson - 9/2.
A two-time Conservative Party leader candidate, Penny Mordaunt is being eyed up by many as the successor to Rishi Sunak, whenever the Prime Minster hands over the reigns.
But the MP for Portsmouth North isn't even guaranteed to be a Member of Parliament after the general election. Labour drifted from slight favourites to slight underdogs at 1/1 behind the 5/6 Conservatives, but the Prime Minister's decision to leave the D-Day commemorations in France early will likely have a significant impact on Mordaunt's constituency of Portsmouth North, particularly as it's where the Royal Navy is based.
Labour are now 2/5 to win the seat, while the Conservatives are 7/4 to hold.
One of the most prominent Conservative MPs since his election in 2005, Grant Shapps looks set to lose his seat in the upcoming election.
Labour are as short as 1/10 to win in Welwyn Hatfield, while the Conservatives are 6/1.
Former British Army officer and current Veterans' Minister Johnny Mercer is another prominent Conservative who looks set to lose his seat in the upcoming election.
Labour are in from 2/7 to 1/5 favourites to win Mercer's seat of Plymouth Moor View, with the Conservatives 4/1, despite taking more than 60% of the vote in 2019.
One of the most prominent Conservative back-benchers, Jonathan Gullis was made deputy chairman of the Conservative Party in March 2024, but is expected to lose his seat at the upcoming election.
Labour are 1/12 to win Stoke-on-Trent North with the Conservatives 7/1.
Former Environment, Health and Work and Pensions Secretary Therese Coffey may be set to lose the seat she's held since 2010.
Exclusively Conservative since it was created in 1983, Suffolk Coastal is another historically safe Tory seat at risk, with Labour 2/7 (was 4/9) to win with the Conservatives 5/2 (was 13/8).
The chairman of the Conservative Party, Richard Holden has recently come under scrutiny for being installed as the candidate for the traditionally safe seat of Basildon and Billericay (won with a 46.3% majority in 2019), despite previously declaring his loyalty to the north east.
Critics have claimed it is a ploy to keep the party chairman in parliament with North West Durham dissolved and four new constituencies created, but Holden now looks like losing his place in the House of Commons, with Labour 4/9 (was 5/4) to win in the Essex constituency, Reform into 3/1 second favourites, and the Conservatives out from 23/10 to 9/2.
Culture Secretary Lucy Frazer is another cabinet minister at risk of losing her seat at the upcoming general election.
Previously the MP for South East Cambridgeshire, which has been Tory since its creation in 1983, Frazer was elected in 2015 but will stand in the newly created constituency of Ely and East Cambridgeshire in 2024.
The Liberal Democrats are 1/2 to win with the Conservatives 6/4.
Formerly Morley and Outwood, the new constituency of Leeds South West and Morley will see Andrea Jenkyns defend her seat, but in what has traditionally been a Labour area, the seat is expected to turn red once again.
Jenkyns came under fire for holding up a middle finger to protesters on her way to Boris Johnson's resignation speech, and the Conservatives are 10/1 to win the seat, with Labour 1/20.
Perhaps the most notable Tory rebel, Philip Davies has voted against the Government more than 350 times across his 19 years in parliament.
Davies is set to stand in the next election but faces being unseated, with Labour 1/7 to win Shipley and the Conservatives 9/2.
In what would be one of the biggest swings on general election night - if not the biggest - Damian Green faces a battle to retain his seat of Ashford in Kent, with Labour 2/11 (was 4/6) to win and the Conservatives 7/2.
Ashford has been Conservative since 1951, with Green first elected in 1997, winning most recently in 2019 with a whopping majority of 40.1%.
Perhaps best known for her time on ITV's GMTV before entering politics, Esther McVey may be about to be unseated for a second time in her Westminster career.
McVey was beaten in her former Wirral West seat in 2015 before taking former Chancellor George Osborne's safe seat of Tatton in Cheshire in 2017.
Labour have never had more than 28.5% of the vote in Tatton, but are 2/5 (was 8/15) to win the seat for a first time, while the Conservatives are 7/4 (was 11/8) to hold.