Peter Phillips dresses for Britain’s unpredictable summer weather as he and Seb Coe make appearance at the British Grand Prix

Peter Phillips appeared to be in high spirits this morning as he attended the British Grand Prix.

The King’s 46-year-old cousin looked ready for action as he arrived at the Silverstone Circuit in Northamptonshire alongside International Association of Athletics Federations president Sebastian Coe.

Princess Anne’s son dressed for the changeable British summer weather, wearing a light button-down shirt, waterproof waistcoat and sunglasses.

Elsewhere, Lord Coe, who spoke to the Princess of Wales’ mother Carole Middleton at Wimbledon earlier this week, wore white trousers, a navy quarter-zip and a suede jacket.

The king’s nephew, who worked in Formula 1 for many years, is often spotted at races and was also photographed at the Grand Prix yesterday.

He looked ready to watch the action in a black, waterproof zip-up jacket worn over a navy blue shirt and white dress shirt.

Peter, who has had a number of career adventures over the course of his life, recently returned to Formula 1 as Head of Partner Acquisitions for sports and entertainment rights agency CSM Sport & Entertainment.

In the past he also worked for the start-up team Stewart Grand Prix (later Jaguar Racing) and Williams.

Peter was recently spotted with his new girlfriend Harriet, as they attended the fourth day of Royal Ascot last month.

The loved-up couple were photographed kissing as they attended an equestrian event in Berkshire.

He had started a new romance with Harriet, a nurse in the NHS, just weeks after splitting from his partner of three years.

In May, the couple spent the weekend together at the Badminton Horse Trial, where they were spotted holding hands.

And this afternoon the couple didn’t show their affection either, as they were captured leaning against each other and exchanging sweet glances.

Princess Anne’s son dressed for the unpredictable British summer weather, wearing a light button-down shirt, waterproof waistcoat and sunglasses

After giving her boyfriend a loving kiss, Harriet was spotted having a lively conversation with Queen Camilla.

And it seems Peter’s family are thrilled with his new romance, as his cousin, Princess Beatrice, was also photographed giving her a warm hug and kiss in greeting.

Earlier this month, his mother said she was “deeply saddened” to miss Canada’s First World War commemoration as she continues to recover from being hit by a horse.

The 73-year-old Princess Royal suffered concussion and head injuries when she was injured at her Gatcombe Park estate in Gloucestershire more than a week ago.

The King’s sister is now recovering at her Gatcombe Park home after spending five nights in hospital after she was allegedly hit by the animal while out walking on June 23.

Anne was due to travel to Canada in early July for an overseas tour, but will now be unable to undertake any further public engagements until her medical team advises that it is safe and comfortable for her to resume her official duties.

Peter was recently spotted with his new girlfriend Harriet, when the pair attended the fourth day of Royal Ascot last month

The princess, who left hospital on Friday, said in her first public message since her accident: “I am deeply sorry that I cannot be with you today as we remember the brave efforts and sacrifices of the members of the Newfoundland Regiment who went into battle on the first day of the Somme.

‘I have fond memories of being with you in 2016, when the people of this island commemorated the 99th Battle of Beaumont Hamel. I am deeply saddened that I will no longer be able to be there. I send you my warmest wishes on this special day of remembrance.’

The Newfoundland Regiment was almost completely wiped out on the first day of the Battle of the Somme at the disastrous Battle of Beaumont Hamel. Of the 800 soldiers fighting, over 700 were wounded or killed.

It is not known how long the princess will recover, but she is receiving rehabilitation support at home, following standard concussion protocols.

Anne’s husband, Vice Admiral Sir Tim Laurence, and her children Zara Tindall and Peter Phillips, were on the estate when she was wounded.