Four days after the death of the Duke of Edinburgh, the Queen has returned to royal duties to commemorate the retirement of her household’s most senior employee.

The royal family is in sorrow over Philip, who died on Friday at the age of 99. During the time of mourning, members of the royal family will “undertake engagements appropriate to the circumstances,” according to the palace.

Buckingham Palace said members of the royal family will wear black mourning bands when appropriate, but does not require them to do so.

Earl Peel announced his retirement as Lord Chamberlain last year, with his successor, former MI5 head Andrew Parker, taking office little over a week before Prince Philip died.

The Queen hosted the departing Lord Chamberlain in a ceremony when he stepped down, according to the Court Circular, which announces the official activity of senior royals.

Despite the fact that she lost her beloved husband of 73 years on Friday and is just a week away from her 95th birthday, the Queen is still at work.

The Court Circular also described a phone conversation the Queen had from UK Prime Minister Boris Johnson on Saturday, April 10, one day after her husband died.

Because of coronavirus limitations, attendance for Philip’s burial will be restricted to 30 people on Saturday at Windsor Castle.

The 30 mourners permitted to attend the ceremony under coronavirus regulations must wear facial masks and are not permitted to sing. According to government regulations, only a “small group of singers will be allowed to perform… with social distancing maintained at all times.”

The funeral procession will include servicemen and women from the Royal Navy, Royal Marines, Army, and Royal Air Force, and Philip’s coffin will be carried to St. George’s Chapel at the castle atop a specially modified Land Rover that he built himself.

Meanwhile, the Princess Royal attended her first formal function since her father’s death, attending the Royal College of Emergency Medicine’s spring conference via video connection as the organization’s patron.

The Duke of York stated on Sunday that the Queen informed her family that Prince Philip’s death at the age of 99 “left a huge void” in her life.

“The Queen, as you would expect, is an incredibly stoic person,” he said.

“She described it as having left a huge void in her life but we, the family, the ones that are close, are rallying round to make sure that we’re there to support her.”