Queen Elizabeth II lays to rest her 'strength and stay' Prince Philip

The Duke of Edinburgh was interred in the Royal Vault at St George's Chapel

Queen Elizabeth II on Saturday bid farewell to her late husband, Prince Philip, at a royal funeral like no other, restricted by coronavirus rules but reflecting his long life of military and public service.

The Duke of Edinburgh, who died on April 9 at age 99, was interred in the Royal Vault at St George's Chapel at Windsor Castle after a 50-minute service attended by just 30 guests.

The Queen, 94, seen for the first time since his death, cut a lone figure, sat in mourning black, with a white-trimmed, black face mask. Close family, also masked, sat socially distanced in the historic 15th-century Gothic chapel.

Philip -- described by royals as "the grandfather of the nation" -- was Britain's longest-serving royal consort and was married to the Queen for 73 years.

He was an almost constant presence at her side during her record-breaking reign that began in 1952 as Britain rebuilt from World War II, and as its global empire began to unravel.

His death, which the family said had left a "huge void" in the Queen's life, has robbed of her of the man she called her "strength and stay" and closes a remarkable chapter for Britain's most famous family, and in the country's history.

Read | Royal family releases Philip montage set to poem

The last high-profile funeral of a senior royal was for the Queen's mother, who died in 2002, aged 101.

But unlike then, when more than one million people thronged outside Westminster Abbey in central London to watch the sombre pageant, the public was noticeably absent from Saturday's ceremony.

The coronavirus pandemic forced hasty revisions to the well-rehearsed plans for the duke's death, code-named "Operation Forth Bridge", stripping back public elements to prevent large crowds from gathering.

Government guidelines limited the number of mourners and a quartet performed hymns the duke chose himself in a barren nave stripped of seating.

The intimate, ceremonial funeral from behind the stately castle walls was broadcast live on television to millions across Britain and the world.

A military gun was fired to signal a minute's silence when his coffin arrived at the chapel on a bespoke Land Rover he designed himself.

The coffin was draped in his standard and topped by a wreath of white roses and lilies from the Queen as well as his naval cap and ceremonial sword.

Across Britain -- on the streets, in shops, railway stations and at sporting events -- people bowed their heads with respect. Prime Minister Boris Johnson, dressed in black, observed the silence at his country retreat, Chequers.

Flights in an out of nearby Heathrow Airport were stopped for the duration of the ceremony.

Ieuan Jones, 37, travelled to Windsor from his home in the Welsh capital, Cardiff, and called Philip "a strong man, a true hero (who) did so much for this country and the royal family".

"It's really a shame that because of the pandemic we can't pay a wider tribute to the exceptional man he was," he told AFP.

Despite the restrictions, the stripped-down sendoff for the former Royal Navy commander still combined centuries of royal protocol with pomp, pageantry -- and military precision.

Members of the British armed forces, in formal dress, lined the procession route, heads bowed, as the cortege passed, as a minute gun rang out across the grounds and a bell tolled.

Philip's grandsons William, 38, and Harry, 36, joined the procession, in their first public meeting since a reported falling out about Harry's shock move to California, and his stinging criticism of royal life, including racism in the family.

The pair, who as young boys walked behind the coffin of their mother, princess Diana, in 1997, were separated by their cousin, Anne's son Peter Phillips, 43.

They were later seen chatting as they left the chapel with William's wife, Kate.

The religious service was a simple affair, reflecting the wishes of the straight-talking duke, who was known for his aversion to "fuss".

In keeping with his wishes, there was no sermon, but the service reflected his love of the sea, and long association with the Royal Navy, including hymns and Bible readings.

The Dean of Windsor, David Conner, paid tribute to his "kindness, humour and humanity", and devotion to the Queen, who turns 95 next week and is in the twilight of her reign.

The Queen, who had been escorted to the chapel by a lady-in-waiting in the royal Bentley, watched from the chapel choir as her husband's was lowered steadily into the Royal Vault by electric motor.

The Pipe Major of the Royal Regiment of Scotland played a lament, and buglers of the Royal Marines sounded The Last Post.

When the Queen dies, he will be transferred to lie alongside her in the King George VI memorial chapel, which houses the remains of her father, George VI, her mother, also called Elizabeth, and the ashes of her younger sister, Margaret.

The striking image of the Queen sat alone with her thoughts dominated every British front page on Sunday.

The Star on Sunday ran with the headline "Bless her", adding "our Queen, truly alone for the first time in 73 years", while the Independent's cover read "Alone in grief, the Queen says goodbye".

The Sunday Express front page insisted "You're not alone Ma'am", saying that the country shared in her grief.

The funeral came after eight days of public mourning for the duke, which has seen the Union Jack flown at half-mast, and a virtual halt in official government business.

It has also brought renewed focus on the central place of the royals in British life and culture, with the ageing Queen and Prince Philip symbolic of another age.

At Buckingham Palace, the Queen's central London home, Cardiff-born chef Santosh Singh laid purple tulips to mark the end of an era.

"I love the royals. I think they're amazing... It's sad because in time, all this will change," the 57-year-old said.

Pollsters YouGov in March found that while 63 per cent of the public supported the monarchy, only 37 per cent of those aged 18-24 wanted it to continue.

Yet Prince Philip's death commanded a flood of tributes from across Britain and around the world, including from the remote Pacific island of Vanuatu, where he is revered as a god.

One of his lasting legacies will be the Duke of Edinburgh's Award (DofE) scheme for young people, which was set up in 1956 and now operates in more than 140 countries worldwide.

Some 6.7 million young people in the UK have taken part. His youngest son, Edward, Earl of Wessex, has assumed a greater role in the organisation, of which he is a trustee.

He will become Duke of Edinburgh when the Queen dies.