People have flocked to central London to join a queue to file past the coffin of Queen Elizabeth II, undeterred by a government warning to stay at home to avoid standing in line for hours to see the late monarch's lying-in-state.

Tens of thousands of people have already filed past the coffin in a steady, solemn stream, queuing for hours through the dark and cold to pay their respects to Britain's longest-reigning monarch - a testimony to the affection in which she was held.

By mid-morning on Saturday, the culture ministry said the waiting time stood at up to 16 hours to reach Westminster Hall to take part.

Earlier, the ministry had said it would pause entry to the queue if demand became too high, adding: "Please do not travel."

On Friday night, King Charles III joined his three siblings - Princess Anne and Princes Andrew and Edward - in a silent vigil at the coffin while their eight children, including William and Harry, will form their own ceremonial guard later on Saturday.

Heir-to-the-throne William and his brother Harry, who have grown apart in recent years after Harry moved to the United States, will both appear in military uniform.

Harry served two tours of duty with the British Army in Afghanistan but so far has appeared in processions in civilian dress after he lost his honorary military titles when he stepped back from public royal duties.

The two brothers will be joined at the vigil by their cousins - Peter Phillips and Zara Tindall, the children of Princess Anne; Princesses Beatrice and Eugenie, the children of Prince Andrew; and Louise and James, the children of Prince Edward.

Thousands of people continue to queue to see the Queen's coffin, with some facing more than a day in line.

The state funeral on Monday, to be attended by nearly 100 presidents and heads of government including those from Australia, United States, France, Japan, Jamaica and Canada, is likely to be one of the biggest ceremonial events ever held in Britain.

On Friday, New Zealand Prime Minister Jacinda Ardern filed past the coffin - one of the first leaders to arrive. The premier of the Canadian province of Alberta, Jason Kenney, described the gathering in central London as "this huge, diverse gathering of people from around the world".

On Saturday, King Charles will meet the prime ministers of the 14 other countries where he is head of state. He will also meet workers in the emergency services who are helping to stage the funeral.

Later the focus will switch to the younger royals and their vigil.

Police said one man had been arrested following a disturbance near the coffin on Friday night, held for an offence under the Public Order Act.

© RAW 2022