Details for mourners of the Queen's coffin confirmed, including wristbands for using the toilet

The government is preparing for an unprecedented number of people to visit Parliament where the late Queen will rest for four days before Monday's state funeral

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Queen's funerals: what to expect from the service on September 19

Hundreds of thousands of mourners are expected to file past the Queen's coffin to pay their respects to Britain's longest reigning monarch.

The government is preparing for an unprecedented number of people to visit Parliament where the late Queen will rest in state for four days before Monday's state funeral.

Culture Secretary Michelle Donelan has told Tory MPs via WhatsApp that visitors may be forced to queue for up to 30 p.m. to enter Westminster Hall to view the Queen's coffin.

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The army is ready to help maintain order on the lines, with 1,500 soldiers ready to help and around 10,000 police expected to be deployed.

Downing Street today confirmed that people queuing will be able to leave to use portable toilets or buy food and return to the same location, as they will be given wristbands to hold their place.

"People have the option of going to the toilet and returning to the queue," the Prime Minister's spokesman said.

The Queen Mother was in state at Westminster Hall in 2002, with her four grandsons watching, including the current King Charles (

Picture:

Getty Images)

There will also be food and drink stalls along the way, although food and drink will not be permitted in Westminster Hall, which will have airport-style security and only small bags will be permitted .

The spokesperson warned people to plan ahead as it will be 'extremely busy' - and the numbers are expected to dwarf the 200,000 mourners who visited the Queen Mother while she was in status in 2002.

Commuters may want to 'modify their working habits accordingly' as London will be 'extremely busy' for the in-state Queen, Number 10 said.