Every rule in place at Prince Philip’s funeral – including the Queen sitting alone

On Tuesday, the 94-year-old monarch hosted her first in-person event since Philip’s passing on Friday to mark the retirement of her household’s most senior official, former Lord Chamberlain Earl Peel.

Her return to work comes as preparations are under way for Philip’s funeral, which will feature servicemen and women from the Royal Navy, Royal Marines, Army and RAF – alongside top military brass – this Saturday at Windsor Castle.

It was announced at the weekend the monarchy and their households would observe two weeks of royal mourning, with members of the family “continuing to undertake engagements appropriate to the circumstances,” a royal official said.

The Earl Peel had overseen arrangements for the duke’s funeral – known as Operation Forth Bridge – before handing responsibility to his successor, former MI5 spy chief Baron Parker, just over a week before Philip died peacefully at Windsor Castle.

In overall charge is Andrew Parker, Baron Parker of Minsmere, who took up his new role on April 1, following the Earl Peel’s retirement after more than 14 years in the post.

The Lord Chamberlain oversees all senior appointments in the household, is the channel of communication between the sovereign and the House of Lords and ensures co-ordination between Buckingham Palace and Clarence House.

Meanwhile, as part of security preparations, Thames Valley Police are carrying out specialist searches around Windsor town, with officers examining street furniture including phone boxes, post boxes, drains and bins as part of the operation.

The force said it has put a range of visible and covert security measures in place for Saturday, when the duke is to be honoured with a ceremonial royal funeral at St George’s Chapel.

It will be a royal funeral like no other, with the Queen and her family wearing face masks and socially distancing as they gather to say their final farewell.

Under new lockdown rules funerals can continue with up to 30 people, and the numbers able to attend weddings, receptions and commemorative events such as wakes rose from six to 15.

People attending a funeral must stay at least two metres apart from anyone not in the same household.

The Queen may have to sit alone during the service due to social distancing rules, the Telegraph has reported.

She is staying at Windsor with a reduced number of around 22 staff, in what has been dubbed HMS Bubble.

The duke’s long-standing close aide, his private secretary Brigadier Archie Miller Bakewell, will be one of the few, and possibly only, non-royals invited to attend the historic occasion inside St George’s Chapel.

As a member of HMS Bubble, he may be the only person eligible to sit with the Queen.

It is thought Philip’s funeral could attract one of the largest television audiences of the year.

The biggest TV audience so far saw 25.1 million people watch Prime Minister Boris Johnson’s televised address on January 4 announcing a new national lockdown, while 13.9 million viewers tuned in for the Duke and Duchess of Sussex’s interview with US broadcaster Oprah Winfrey last month.

Broadcasters have yet to confirm their plans for Philip’s funeral, but the BBC and ITV are likely to devote several hours to the event.