An online petition calling on the government to revoke Article 50 and cancel Brexit has attracted nearly five million signatures.

The petition, started in late February, has the highest rate of sign-ups on record, according to the official Petitions Committee. By the early hours of Sunday morning more than 4,750,000 people had signed.

The official website has crashed numerous time since the petition leapt in popularity on Wednesday following Theresa May’s appeal to the British people to support her as she demanded MPs back her deal.

Signatures continued to be added even after the threat of a no-deal exit on 29 March was removed when EU leaders agreed Brexit could be delayed.

Asked about the growing number of signatories on Thursday, Ms May said she did not believe in halting the deadline after the EU offered a delay plan.

"Leave means leave" - Brexit Betrayal march Show all 15 1 /15 "Leave means leave" - Brexit Betrayal march "Leave means leave" - Brexit Betrayal march Nigel Farage waves from the top deck of the Brexit Betrayal bus on the march from Sunderland to London Reuters "Leave means leave" - Brexit Betrayal march Marchers pass a sign to "Cuckoo Land" in Easington Getty "Leave means leave" - Brexit Betrayal march Marchers plod on near Grangetown, Tyne and Wear Getty "Leave means leave" - Brexit Betrayal march A marcher holds up a blue passport as the march passes Grangetown, Tyne and Wear Getty "Leave means leave" - Brexit Betrayal march Nigel Farage poses for a photo in a pub in Hartlepool Reuters "Leave means leave" - Brexit Betrayal march Nigel Farage pays his respects to Tommy, the statue of a First World War soldier in Seaham, County Durham Getty "Leave means leave" - Brexit Betrayal march An anti-Brexit van has been graffitied in Sunderland on the Brexit Betrayal march Getty "Leave means leave" - Brexit Betrayal march A marcher carries a Union flag reading "Storm Brexit" in Sunderland Getty "Leave means leave" - Brexit Betrayal march A couple push a Save Our Sovereignty trolley through a tunnel in Easington, County Durham during the Brexit Betrayal march Getty "Leave means leave" - Brexit Betrayal march Nigel Farage enjoys a pint with fellow marchers in Hartlepool Getty "Leave means leave" - Brexit Betrayal march A pro-European counter-marcher lets off a smoke grenade with the colours of the EU flag Getty "Leave means leave" - Brexit Betrayal march Nigel Farage leads the march in Easington Getty "Leave means leave" - Brexit Betrayal march Marchers plod on near Easington Getty "Leave means leave" - Brexit Betrayal march Nigel Farage takes part in the Brexit Betrayal march Getty "Leave means leave" - Brexit Betrayal march Nigel Farage poses on the top deck of the Brexit Betrayal bus in Seaham Getty

As the petition attracted attention, conspiracy theories arose suggesting that a small proportion of signatures from addresses listed as overseas meant that the petition had been “hijacked by bots” .

But in a tweet, the House of Commons petitions committee clarified that 96 per cent of the signatures are listed as from the UK.

They added that overseas signatures were valid, since “anyone who is a UK resident or a British citizen can sign a petition. This includes British citizens living overseas.”

Analysis by software firm Tableau of the 16,000 petitions running on the government website showed the revoke Article 50 petition had more than three times as many signatures as all the pro-Brexit petitions combined.

After the number of signatures passed one million, the petitions committee, a cross-party group of MPs appointed to examine petitions to parliament, said the rate of signing was the highest its website had ever had to deal with.

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Organiser Margaret Anne Georgiadou wrote: “The government repeatedly claims exiting the EU is ‘the will of the people’.