Article continues below advertisementPrince Harry is maintaining one of the royal family's oldest Christmas traditions for his children, Archie and Lilibet, despite now living thousands of miles from his homeland and being estranged from The Firm, OK! can reveal.Even after stepping back from royal duties and relocating to California with his wife, Meghan Markle, 44, the Duke of Sussex, 41, has continued the Windsor family custom of opening presents on Christmas Eve - a practice dating back to Queen Victoria's reign in the 19th century.