The Festival Of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England

Princess Anne, The Princess Royal walks the cross country course as she attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Princess Anne, The Princess Royal walks the cross country course as she attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Mia Tindall waves a fork in the air as she and her uncle Peter Phillips attend day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Zara Phillips carries daughter Mia Tindall as she attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Zara Phillips carries daughter Mia Tindall as she attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

(L-R) Autumn Phillips, Zara Phillips and Mia Tindall attend day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Zara Phillips chases daughter Mia Tindall as she attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

 Zara Phillips and daughter Mia Tindall attend day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England

Prince Edward, Earl of Wessex and daughter Lady Louise Windsor attend day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England

Sophie, Countess of Wessex and Autumn Phillips attend day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England.

Prince Edward, Earl of Wessex attends day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England

(R) Sophie, Countess of Wessex and Autumn Phillips watch their children play on an inflatable slide as they attend day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England.

 Lady Louise Windsor attends day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England.

(R) Sophie, Countess of Wessex and Autumn Phillips attend day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England.

Mia Tindall attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Zara Phillips chases daughter Mia Tindall as she attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Zara Phillips chases daughter Mia Tindall as she attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England

Zara Phillips carries daughter Mia Tindall as she and Mike Tindall attend day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Mia Tindall waves a fork in the air as she and her uncle Peter Phillips attend day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England

Mia Tindall attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Mia Tindall attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England

Autumn Phillips carries niece Mia Tindall as she attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England

James, Viscount Severn plays on an inflatable slide as he attends day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England.

Prince Edward, Earl of Wessex sits on the grass to watch the cross country phase of the competition as he attends day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England

Sophie, Countess of Wessex attends day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England.

Prince Edward, Earl of Wessex and daughter Lady Louise Windsor attend day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England

(L) Mark Phillips (Peter and Zara Phillips's father) puts on a crash helmet before taking part in a quad bike stunt display on day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England

(L) Mark Phillips (Peter and Zara Phillips's father) takes part in a quad bike stunt display on day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England.

 (R) Mark Phillips (Peter and Zara Phillips's father) takes part in a quad bike stunt display on day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England.

Mark Phillips (Peter and Zara Phillips's father) puts on a crash helmet before taking part in a quad bike stunt display on day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England.

Zara Phillips carries daughter Mia Tindall as she attends day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England

(L) Mark Phillips (Peter and Zara Phillips's father) puts on a crash helmet before taking part in a quad bike stunt display on day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England

(L) Sophie, Countess of Wessex and Autumn Phillips watch their children play on an inflatable slide as they attend day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England

Sophie, Countess of Wessex and daughter Lady Louise Windsor sit on the grass to watch the cross country phase of the competition as they attend day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England.

Mia Tindall's hat falls over her face as she attends day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England.

Zara Phillips carries daughter Mia Tindall as she attends day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England

Zara Phillips carries daughter Mia Tindall as she attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

 Princess Anne, The Princess Royal walks the cross country course as she attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Princess Anne, The Princess Royal walks the cross country course as she attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Curios Mia Tindall about to pull electrical plugs during day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Mike Tindall attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England

Mia Tindall, accompanied by her uncle Peter Phillips, waves a fork in the air as horse 'Many Clouds', winner of the Grand National parades in the arena on day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Zara Phillips carries daughter Mia Tindall as she attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Zara Phillips and daughter Mia Tindall attend day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Zara Phillips carries daughter Mia Tindall as she attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.



Mia Tindall attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England

Princess Anne, The Princess Royal walks the cross country course as she attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England

Autumn Phillips carries niece Mia Tindall as she attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England

Autumn Phillips looks on as daughter Isla Phillips(L) pulls faces at her cousin Mia Tindall on day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England

Mike Tindall attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England

 Autumn Phillips looks on as neice Mia Tindall pulls a girls hair on day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Autumn Phillips looks on as neice Mia Tindall pulls a girls hair on day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Mia Tindall at the Gatcombe Horse Trials 2015

Mia Tindall having lunch during the annual Gatcombe Horse Trials 2015

Zara Phillips carries daughter Mia Tindall as she attends day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England

Isla Phillips attend the annual Gatcombe Horse Trials 2015 on Princess Anne's Gatcombe Estate

Savannah Phillips attend the annual Gatcombe Horse Trials on Princess Anne's Gatcombe Estate on Augugst 8, 2015



Mike Tindall carries his daughter Mia during the annual Gatcombe Horse Trials 2015 on Princess Anne's Gatcombe Estate



Sophie, Countess of Wessex and son James, Viscount Severn attend day 2 of the Festival of British Eventing at Gatcombe Park on August 8, 2015 in Stroud, England

Zara Phillips attend the annual Gatcombe Horse Trials 2015 on Princess Anne's Gatcombe Estate

Zara Phillips attend the annual Gatcombe Horse Trials 2015 on Princess Anne's Gatcombe Estate

Autumn Phillips carries niece Mia Tindall as she attends day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

(L-R) Autumn Phillips carries niece Mia Tindall with daughter Savannah Phillips and husband Peter Phillips during day 3 of the Festival of British Eventing at Gatcombe Park on August 9, 2015 in Stroud, England.

Autumn Phillips and daughter Isla watch the bike stunt by Australian Matt Coulter at the annual Gatcombe Horse Trials on Princess Anne's Gatcombe Estate



(L) Savannah and Isla Phillips at the annual Gatcombe Horse Trials 2015 on Princess Anne's Gatcombe Estate