Zara Phillips and a big hug for her 13-year-old half sister

Zara Phillips and a big hug for her 13-year-old half sister

Zara and a big hug for her 13-year-old half sister

11:15 PM on 31st August 2011

Friendly: Zara yesterday with her half-sister Stephanie. Both will compete at the Burghley horse trials

Friendly: Zara yesterday with her half-sister Stephanie. Both will compete at the Burghley horse trials

Hot to trot: Zara Phillips puts horse High Kingdom through his paces

Hot to trot: Zara Phillips puts horse High Kingdom through his paces