As Princess Diana’s police protection officer, Ken Wharfe saw a side to the royal that very few people knew. He spent his working days with Diana and her two mischievous sons, William and Harry, doing day-to-day activities like the school run and days out. To mark the launch of his new book Diana: Remembering the Princess, released to mark the 25th anniversary of her tragic death, Ken sits down with Zoe Forsey to share his memories of his old boss and his thoughts on the royal family today.