Not another royal sibling spat! Mike Tindall leaps into action to break up play fight between daughter Lena, 6, and son Lucas, 3, as family cheer on Zara at Burghley Horse Trials

Mike Tindall had to break up an innocent brawl between his two youngest children when they came to cheer on Zara at the Burghley Horse Trials today.

The former rugby player was joined by his daughters Mia, 10, Lena, 6, and son Lucas, 3, at Burghley House near Stamford, Lincolnshire on Saturday afternoon.

Mike, 45, was photographed carrying his youngest child through the park, before his six-year-old daughter clung to his arm to be lifted just inches off the grass.

The royal also posed for a photo with fans who spotted him on a family day out, including one taken by his eldest daughter, 10-year-old Mia.

The family were at Burghley House to watch Zara compete in the cross-country competition at the Burghley Horse Trials with her horse Class Affair.

Lucas, three, shows off his karate skills to his six-year-old sister Lena

The royal children also enjoyed an ice cream while watching Zara Tindall compete

Princess Anne’s daughter fell at Rolex Corners during Class Affair, which knocked her out of the competition. Fortunately, Zara and her horse were unharmed.

Later in the day, Zara and Mike’s three children clearly enjoyed their day out, eating ice cream and showing off their karate skills in the friends and family corner.

Mike was even seen spinning three-year-old Lucas in the air after the boy started fighting with his six-year-old sister Lena.

Zara’s husband Mike kept it casual in a white T-shirt and blue jeans at Burghley House, completing his outfit with a baseball cap and khaki backpack.

Lena and Lucas were also dressed casually for the day, while their older sister Mia was a mini version of her dad in jeans, a T-shirt and a baseball cap.

The Defender Burghley Horse Trials is an annual three-day event usually held in early September at Burghley House, near Stamford.

The Tindalls’ outing follows the launch of her raincoat collection by Zara, who praised her mother for teaching her the importance of “good quality clothing”.

The former rugby player was joined by his daughters Mia, 10, Lena (above), six, and son Lucas, three, at Burghley House near Stamford, Lincolnshire on Saturday afternoon

Mike spins three-year-old Lucas around in the air in the friends and family area

Mike, 45, was photographed carrying his youngest child through the grounds, before his six-year-old daughter clung to his arm as he was lifted inches off the grass

The royal also stopped to take photos with fans who spotted him during a day out with his family – captured by his eldest daughter, 10-year-old Mia (above)

Zara will compete in the cross-country section of the Burghley Horse Trials with her horse Class Affair

The 43-year-old, who is often cited as the most fashionable royal, has collaborated with Musto and Fairfax & Favor to create a collection of coats, priced from £350 to £450.

The collection, called Odyssey, features “highly versatile” styles, including both long and short models suitable for any outdoor activity this fall and winter.

Zara, Princess Anne’s daughter, said the coats combine the strongest qualities of two of her favourite brands.

Lena and Lucas were dressed casually for the day, while their older sister Mia was the mini version of her dad in jeans, a T-shirt and a baseball cap

The Defender Burghley Horse Trials is an annual three-day event usually held in early September at Burghley House near Stamford

The Tindalls’ outing comes after Zara praised her mother for teaching her the importance of “good quality clothing” when she unveiled her collection of raincoats

She said, “By combining Musto’s technical skills with Fairfax & Favor’s quintessentially British style, the result is a collection of jackets that I’m excited to wear this winter.’

The mother of three also told The Telegraph that her mother, the Princess Royal, influenced her core values ​​when choosing her clothes.

She said, “My mother taught me the importance of wearing good clothes that keep you warm and comfortable when you are outside.

‘As an athlete, I spend most of my time in nature. This is more important than ever to help me stay at my best.’

Lucas Tindall puts on his sister’s jacket as they run through the grass