The new march for a People’s Vote has already attracted more than £250,000 in donations, with hundreds of thousands of people expected to attend next month.

In just six days since the march was announced, with support from the Independent’s Final Say campaign, organisers said they had been overwhelmed by the response.

One group of activists from the West of England has even paid for an entire train – which has been branded “The People’s Vote Express” – to bring people to the march in London.

The demonstration is set to take place on Saturday 23 March, just six days before the UK is due to drop out of the European Union.

Luke Myer, supporter of For Our Future’s Sake (FFS), a student-led group campaigning for a People’s Vote, said it might well be the last chance to demand "a democratic final say on this mess before it’s too late”.

“Instead of allowing the can to be kicked down the road towards the 29 March deadline, hundreds of thousands of people will march on parliament offering a solution to a crisis that threatens their living standards, businesses and jobs," he said.

“This is a crisis – when anyone who cares about the future, anyone who feels betrayed by broken promises in the last referendum, anyone who wants to prevent years more of this madness should come to make their voice heard. It’s now or never.”

More than £250,000 has been donated by supporters, with the final target set at £500,000. Almost 10,000 individuals have given money in just a few days, donating an average of £26 each. More than 1,000 donors have given money for the very first time.

Activists from Bristol and Bath have paid for an entire 657-seat train. Almost 100 coaches have already been booked, including 16 from supporters in Devon alone.