Phillips undeterred by royal questioning ahead of Olympics

Zara Phillips reveals she is "massively excited and honoured" to be competing at London 2012, laughing off a question about her grandmother from a reporter.

The 2006 world champion said her family are "very proud and right behind" her as she prepares to compete at the Olympics for the first time on her new mount, High Kingdom, alongside Kristina Cook, William Fox-Pitt, Piggy French and Mary King in the eventing team.

Phillips had to withdraw from competing in the 2008 Beijing Games when her previous horse, Toytown, was injured two months before the competition began.