Bruce Leighton’s letter box has been filled this week with some official looking envelopes as he receives messages congratulating him on his 100th birthday on Thursday. The Ashburton Courier was there as he opened messages from His Majesty King Charles, Governor General Dame Cindy Kiro, Prime Minister Christopher Luxon, Rangitata MP James Meager and Minister for Seniors Casey Costello. The retired accountant said it was amazing to receive special greetings, including one from his alumni school, Auckland Grammar. Bruce’s advice on how to live to such a grand age is ‘‘keep the mind and body active’’. The sprightly 100-year-old has been reminiscing over a life well-lived. ‘‘I have had a very happy life,” Bruce said. Bruce arrived in Ashburton, with his wife Mary, to take up a job with Farming Accounts, part of Farmers Mutual Insurance. When the opportunity came up to buy the business, he jumped at the chance.…