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About a million people took part in Saturday's protest in London demanding a referendum on the UK's Brexit deal.

That's according to reports from the march's organisers, the "Put It To The People" campaign.

The protestors are calling for the final deal, setting out the circumstances under which the UK would leave the European Union (EU), to be put to the people.

Crowds waving flags and carrying placards were told the initial count showed more than a million people had turned up - which would make it one of the largest marches in the UK this century.

����ý correspondent Richard Lister, who was there, reported: "The organisers say it was one million-strong, it's very hard to verify those kinds of claims but this was a very significant march, well into the hundreds of thousands."

The event was planned for this date because it was six days before 29 March - the date the UK was due to leave the group of countries called the EU.

However EU leaders have now agreed that the UK can delay Brexit, subject to certain conditions.

Labour's Tom Watson told the crowd in Parliament Square that Mrs May's deal was a "lousy" one - whether you voted Leave or Remain.

He said he had this message for her: "I can only vote for a deal if you let the people vote on it too. Prime Minister, you've lost control of this process, you're plunging the country into chaos, let the people take control."

There are reports that some members of the Conservative Party, which Theresa May leads, have told the Prime Minister she must promise to stand down as PM in a bid to gain support for her Brexit deal.

MPs in the party have said they might reluctantly back the agreement if they know she will not be in charge of the next stage of negotiations with the EU.

But No 10 has dismissed reports that Mrs May could be persuaded to stand aside.

Another Brexit-related protest is also heading to London, having started in Sunderland a week ago.

It's led by former UKIP leader Nigel Farage, who has long called for the UK to leave the EU and was a key pro-Brexit figure during the referendum campaign.

The Leave Means Leave campaign was organised in protest at a what supporters say is a "betrayal" by the government when it comes to Brexit.

Speaking to around 200 Brexit supporters, Mr Farage said that Mrs May had reduced the nation "to a state of humiliation", and that those gathering for the People's Vote march in London were not the majority.

Meanwhile other members of the public are pushing for the government to revoke - or cancel - Article 50 as a way to stop the UK from the leaving the EU without a deal.

Article 50 is the name of the legal process by which the UK will leave the EU.

More than 4 million people have signed a petition calling for Brexit to be cancelled, with UK government's petition platform having crashed several times because of the level of internet traffic to the site.

The petitions committee said: "Between 80,000 and 100,000 people have been simultaneously viewing the petition to revoke article 50. Nearly 2,000 signatures are being completed every minute."