By Jennifer Newton As a new decade dawned four years ago, Prince Harry and Meghan Markle made one of their most shocking moves. On this day in 2020, the Sussexes made the bombshell announcement that they would be stepping back from their royal roles and quitting the UK. Their sensational statement sent shockwaves around the world – and was even said to have blindsided some in the Royal Family. It prompted the late Queen to call an extraordinary family meeting – now known as the Sandringham Summit – where she, Harry, then Prince Charles and Prince William tried to thrash out a way forward. Afte…