Back to work! Zara Tindall looks ready to take on competition as she arrives for day three of the Burghley Horse Trials

It’s been a busy week for Zara Tindall, who has competed in the Burghley Horse Trials with her favorite steed Class Affair.

And the action didn’t stop on Saturday, when Princess Anne’s daughter was spotted making her way through the grounds in Stamford, Lincolnshire.

Zara, 42, wore a navy blue fleece with the Land Rover logo on it as she walked around the grounds, checking her watch quickly.

The mum-of-three paired the short-sleeved zip-up jacket with matching breeches and wore a simple pair of black trainers for the early start.

She completed her casual ensemble with a black cap and had a pair of AirPods ready for the busy day ahead.

Her arrival on the third day of the Trials follows a closely fought competition on Thursday, when she competed in dressage on her majestic horse, Class Affair.

The mother-of-three wore sophisticated white trousers, a fitted navy double-breasted blazer with tails and a high-collared shirt.

Zara’s horse, Class Affair, looked just as beautiful with a brown earmuff, also known as a fly cap or fly cap, and impeccably braided mane.

Taking place at Burghley House, Stamford, Lincolnshire, the Burghley Horse Trials are one of the last events of the summer social scene and often draw large crowds.

The four-day event is a comprehensive test of a horse’s skills, taking in dressage, show jumping and cross-country events.

Zara’s husband, ex-rugby chief Mike Tindall, 44, is likely to be cheering his wife on again for the next four days, along with the three children they share: Mia, nine, Lena, five, and two-year-old Lucas.

Zara’s family showed their support earlier this week at the Wellington International Horse Trials in Heckfield.

The mum-of-three paired the short-sleeved zip-up jacket with matching breeches and wore a simple pair of black trainers for the early start

The royal family wore a waterproof blue jacket to protect against the drizzle on Friday, along with a branded black Defender cap and navy blue breeches.

Mia Tindall, nine, and her siblings Lena, five, and Lucas, two, enjoyed a playful day out as they came to cheer on their mum Zara Tindall at an equestrian event.

The three royal siblings joined their father, former England rugby player Mike, on the sidelines of the event.

But the delighted kids seemed more excited by the bouncy castle and teacup rides at the venue. Lucas and his father had a good time on a carousel ride.

Zara, 42, looked focused and ready to take on some tough competition as she warmed up for day two of the Burghley Horse Trials in Stamford, Lincolnshire