In 1991, by royal warrant he became the official candlemaker to Prince Charles and a regular candlemaker for royal residences including Highgrove and St. James Palace and various royal events. In 1993, Constable set up shop in Gelligroes Mill, Blackwood, Caerphilly, Wales, and also runs a shop on Shepherds Bush Road in London. He has made candles for the Harry Potter film series, the Pirates of the Caribbean film series, "First Knight", "Interview with a Vampire", "Cinderella", "", "Gosford Park", "Sherlock Holmes", "Doctor Who", "Game of Thrones", "Downton Abbey", and "Merlin". He also made the candles for the Wedding of Prince William and Catherine Middleton in 2011.