Prince Charles and Duchess Camilla have arrived in Scotland as they relocate in order to keep the Queen company this month.The Queen moved to her Balmoral Estate in the Scottish Highlands on July 23 for the first time as a widow, following the death of her husband Prince Philip in April.The late Duke of Edinburgh would always join his wife at the royal residence for the summer, with other family members coming to stay for a few weeks at a time, but this year Her Majesty will be alone.