The rush to say goodbye to Queen Elizabeth II's coffin never stops.

Thousands of mourners waited several kilometers along the Thames in London to pay their respects to the Queen.

Authorities estimated the wait for those who queued on Saturday at more than 24 hours.

The closed coffin of the Queen is laid out in the Westminster Hall of the British Parliament until Monday morning before the state funeral for the Queen, who sat on the throne for 70 years.

Her eight grandchildren - including Princes William and Harry - are holding a 15-minute wake on Saturday night.

Charles III

and Prince William surprise mourners

The British King Charles III.

and Prince William paid a surprise visit to mourners in the kilometer-long queue outside Westminster Hall in London on Saturday.

Britain's new monarch and his son shook hands and chatted with waiting citizens on Lambeth Bridge, which spans the Thames. 

Before the funeral service for Elizabeth II and her funeral on Monday, hundreds of thousands of people are expected to say goodbye to the late Queen at the coffin this weekend.

Westminster Hall remains open to the public until 7:30 a.m. on Monday morning, with the monarch's coffin laid out in state.

The authorities expected another huge rush on Saturday and Sunday.

incident on Friday evening

An incident occurred late Friday night when a man attempted to touch the coffin.

The Metropolitan Police said the man had been arrested for violating the Public Order Act.

Previously, King Charles III.

and his siblings - also for a quarter of an hour - took over the wake at the coffin.

King Charles III, Princess Anne, Prince Andrew and Prince Edward positioned themselves around the coffin in the evening, all in uniform, clasped their hands and looked down.

Many other members of the Royal Family attended the wake from a podium on the edge of Westminster Hall in Parliament.

The wake was reportedly the only occasion at the celebrations that Prince Andrew was allowed to wear a uniform.

The Queen stripped her second eldest son of all military ranks earlier this year for his involvement in the abuse scandal surrounding the late US multi-millionaire Jeffrey Epstein.

At all other ceremonies he was dressed in civilian clothes.

Elizabeth II died on Thursday September 8th at the age of 96 at her Scottish country estate at Balmoral Castle.

Her coffin was brought to Scotland's capital Edinburgh on Sunday and then to London on Tuesday evening.

There, Charles' closest family escorted him on Wednesday afternoon in a solemn procession from Buckingham Palace to Parliament, where he has been laid out ever since.

Man from London queues twice

Countless people have taken the opportunity to pause at the coffin since Wednesday.

A man from London, he told the BBC, had queued twice.

His first queue to Westminster Hall, where the Queen's festively decorated coffin lies until Monday morning, lasted twelve hours.

However, according to the BBC report, that didn't stop Mason from queuing up again after a short hiatus during which he took his car to the workshop.

The organization of the queue was much better the second time around.

"It's history and I want to be a part of it," said the Londoner.