Princess Anne's children Peter Phillips and Zara Tindall are part of one of the most famous families in the world, but few people know about their half-sister Stephanie Phillips, who has chosen a quiet life away from the Royal Family

The Worcester-based eventing pro seems to share an especially warm relationship with Peter, with Stephanie describing him as 'the best big brother out there'.

Princess Anne's children Peter Phillips and Zara Tindall are part of one of the most famous families in the world, but few people know about their half-sister Stephanie Phillips,…