She completed Papua New Guinea's Kokoda Track as part of her award. "The trek was very hard but it has given me the confidence I can achieve anything I put my mind to," Ms Healey said. "It's also given me an appreciation of what soldiers went through during the Second World War. "It was the hardest thing I've ever done." Prince Philip established the award, which started in Australia in 1959 and has since been completed by more than 775,000 young Aussies. "It's what I like to describe as a do-it-yourself growing up kit," he once said of the award scheme. Prince Philip died on April 9. He retired as patron of the award in 2017 and was succeeded by his son Prince Edward.