The death of the longest-serving UK monarch brought hundreds of dignitaries to London, including a raft of senior Gulf royals and officials. However, the apparent absence of Saudi Crown Prince Mohammed Bin Salman and, to a lesser extent, UAE President Sheikh Mohammed Bin Zayed, was also a point of intrigue. In the days since the funeral events GSN has investigated speculation over whether the Saudi heir did indeed make a private visit to express his condolences to royal family members.