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 was forced to break up a harmless play fight between his two youngest children as they arrived to cheer on Zara at the Burghley Horse Trials today.

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

Mike, 45, was pictured carrying his youngest child through the grounds, before his six-year-old daughter clung to his arm to be lifted inches from the grass.

The royal also stopped to take photographs with fans who spotted him on a day out with his family – snapped by his eldest daughter, 10-year-old Mia.

The family were at Burghley House to watch Zara compete on her horse Class Affair in the cross country section of the Burghley Horse Trials.

Mike Tindall was forced to break up a harmless play fight between his two youngest children as they arrived to cheer on Zara at the Burghley Horse Trials today

Peter Phillips' girlfriend Harriet Spelling seen catching the royal children - Lucas and sister Lena harmless play fighting

Peter Phillips’ girlfriend Harriet Spelling seen catching the royal children – Lucas and sister Lena harmless play fighting

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

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

Mike Tindall trying to life daughter Lena from the floor after the siblings harmlessly play fight at the event

Mike Tindall trying to life daughter Lena from the floor after the siblings harmlessly play fight at the event 

The father also had to pick up Lucas from the floor after the pair played together

The father also had to pick up Lucas from the floor after the pair played together

The royal children also enjoyed an ice cream as they watched Zara Tindall compete

The royal children also enjoyed an ice cream as they watched Zara Tindall compete

The young royal is all smiles after enjoying a delicious ice cream at the event

The young royal is all smiles after enjoying a delicious ice cream at the event

Princess Anne’s daughter fell from Class Affair at Rolex Corners, knocking her out of the competition, but thankfully both Zara and her horse were unharmed. 

Later in the day, Zara and Mike’s three children were clearly enjoying their day out, grabbing an ice cream and showing off their karate moves in the friends and family area.

Mike was even seen spinning three-year-old Lucas in the air, after the youngster started a play-fight with his six-year-old sister, Lena. 

Zara’s supportive husband Mike kept things casual in a white T-shirt and blue jeans at Burghley House, finishing his ensemble with a baseball cap and khaki backpack.

Lena and Lucas were also dressed casually for the day, while their elder sister Mia was her father’s mini-me in jeans, a T-shirt and a baseball hat.    

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

The Tindall’s outing comes after Zara hailed her mother for teaching her the importance of ‘good quality clothing’ as she unveiled her collection of raincoats.

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

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

Father Mike Tindall racing after young Lucas on day three of the Burghley Horse Trials at Burghley House in Lincolnshire

Father Mike Tindall racing after young Lucas on day three of the Burghley Horse Trials at Burghley House in Lincolnshire 

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

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

Mike, 45, was pictured carrying his youngest child through the grounds, before his six-year-old daughter clung to his arm to be lifted inches from the grass

Mike, 45, was pictured carrying his youngest child through the grounds, before his six-year-old daughter clung to his arm to be lifted inches from the grass

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

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

Zara is due to compete on her horse Class Affair in the cross country section of the Burghley Horse Trials

Zara is due to compete on her horse Class Affair in the cross country section of the Burghley Horse Trials

Lena and Lucas were dressed casually for the day, while their elder sister Mia was her father's mini-me in jeans, a T-shirt and a baseball hat

Lena and Lucas were dressed casually for the day, while their elder sister Mia was her father’s mini-me in jeans, a T-shirt and a baseball hat

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

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

The Tindalls' outing comes after Zara hailed her mother for teaching her the importance of 'good quality clothing' as she unveiled her collection of raincoats

The Tindalls’ outing comes after Zara hailed her mother for teaching her the importance of ‘good quality clothing’ as she unveiled her collection of raincoats

The 43-year-old, who is often named the most fashionable royal, has worked in collaboration with Musto and Fairfax & Favor to create a collection of jackets, which range in price from £350 to £450.

The collection, named Odyssey, includes ‘very versatile’ styles, including both longline and shorter styles to suit every outdoor activity this autumn and winter.

Zara, the daughter of Princess Anne, said the jackets combine the strongest parts of two of her favourite brands.

She said: ‘Combining Musto’s technical prowess and Fairfax & Favor’s quintessentially British style has resulted in a collection of coats I’m looking forward to wearing this winter.’

The mother-of-three also told The Telegraph that her mother, the Princess Royal, has influenced what she values most when choosing her clothing.

She said: ‘Mum taught me the importance of having good quality clothing that keeps you warm and comfortable outdoors.

‘As a sportswoman who spends most of my time in nature, this is more important than ever to help me stay at my best.’

Lucas Tindall pulls on his sister's jacket as they run through the grass

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

Elsewhere the young royal tots' uncle Peter Phillips and his girlfriend Harriet Sterling enjoy the dy out

Elsewhere the young royal tots’ uncle Peter Phillips and his girlfriend Harriet Sterling enjoy the dy out 

Ms Sterling is all smiles as she dons a pink frock sitting next to Peter on day three of the Burghley Horse Trials

Ms Sterling is all smiles as she dons a pink frock sitting next to Peter on day three of the Burghley Horse Trials 

Peter Phillips sports a casual look wearing a checked blue and white shirt, a pair of jeans and a hat to match

Peter Phillips sports a casual look wearing a checked blue and white shirt, a pair of jeans and a hat to match

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