Their final vigil for the Queen: Sombre King Charles joins the Earl of Wessex, the Princess Royal and a military-dressed Prince Andrew in Westminster Hall as they stand at guard at Her Majesty's coffin for last time before Monday's funeral The Queen's four children this evening stood guard of their mother's coffin for 10 minutes at Westminster Hall It was their second, and final, Vigil of the Children and mirrored event held at St Giles' Cathedral in Edinburgh Prince Andrew wore military uniform at the event today, having been banned from donning military colors The Queen's eight grandchildren, including William and Harry, will perform their own similar vigil tomorrow King Charles and his siblings, Princess Anne and Princes Andrew and Edward, on Friday mounted their touching final vigil for the Queen before the late-monarch is laid to rest on Monday. As tearful mourners watched on, the Queen's four children stood guard of their mother's coffin for more than 10 minutes at Westminster Hall this evening. The siblings each guarded a side of the coffin, with Charles, dressed in a Navy Admiral uniform, standing at the head. It was their second, and final, vigil for the beloved monarch. Known as the 'Vigil of the Children' - an honor dating back to the time of George V - it mirrors a previous event held earlier this week at St Giles' Cathedral in Edinburgh. However, unlike the previous vigil in which Charles donned a kilt and Andrew a morning suit, all four siblings were tonight dressed in military colors.