Foot soldiers for the parties and leading independent candidates battled to turn out support across London on Thursday with a handful of votes likely to sway the outcome in key seats.
Canvassers were going door to door to hand out leaflets, ensure voters know where their polling station is located and offer lifts to people who might need one before the polls close at 10pm.
They were also reminding voters to bring photo ID for the first time in a General Election, and pointing out that postal votes can be hand-delivered to polling stations, after problems with the mailing process were reported around the country.
Sir Keir Starmer, who pollsters predict will become the first Labour Prime Minister since 2010, voted with wife Victoria at a polling station near their Kentish Town home.
His constituency of Holborn and St Pancras is rock-solid Labour, but the need for a last-ditch scramble for votes elsewhere was underlined in the final large-scale MRP poll released by YouGov late on Wednesday.
It pointed to some nail-biting races across London, including in Jeremy Corbyn’s seat of Islington North.
The former Labour leader, now running as an independent, held a final rally on Wednesday evening in Highbury Fields with hundreds of supporters including RMT General Secretary Mick Lynch and The Voice winner Jermain Jackman.
Fly-posters promoting Mr Corbyn have been plastered illegally on walls and street furniture around the Inner London constituency. Some of the signs on the approach to Holloway Road station were torn down overnight before the polls opened.
His campaign denied the posters were officially sanctioned.
YouGov projected the veteran Left-winger to take 37.9 per cent of the vote in Islington North against 42.7 per cent for the Labour candidate, local councillor Praful Nargund, making the race too close to call.
Another Left-winger spurned by Labour, Faiza Shaheen, was forecast to come third in Chingford and Woodford Green where former Conservative leader Sir Iain Duncan Smith is at risk of losing his seat to Labour’s Shama Tatler.
Ms Tatler had 34.6 per cent in the final MRP survey to Sir Iain’s 25.9 per cent.
The battle in Finchley and Golders Green, where Labour is battling to regain Jewish support after the antisemitism toxicity of the Corbyn years, was much closer.
Conservative candidate Alex Deane was on 33.8 per cent to 32.9 per cent for Labour’s Sarah Sackman.
Mr Deane has been hammering away at Labour’s plan to stop the VAT exemption on independent school fees, which could disproportionately affect parents of children in private Jewish schools in Margaret Thatcher’s old stomping ground.
But Finchley represented one of the only glimmers of opportunity for the Tories with YouGov suggesting the party will win a mere six out of the capital’s 75 constituencies, with the Liberal Democrats also taking six and the rest going to Labour.
London minister Greg Hands was forecast to lose to Labour’s Ben Coleman in Chelsea and Fulham, spelling a total wipeout for the Tories in Inner London with the party also apparently heading for defeat in Cities of London and Westminster and the new constituency of Kensington and Bayswater.
The Lib Dems were projected to double their London seat count by taking the Tory-held constituencies of Wimbledon; Sutton and Cheam; and Carshalton and Wallington.
The impact of Reform UK’s insurgency was clear in Orpington, normally a safe Tory seat where Labour are just ahead.
Nigel Farage’s party is on its second candidate in the South-east London constituency after it was revealed that the previous one tweeted last year that “the only solution” is to “remove the Muslims from our territory”.
