By Joseph Wilkes & Lauren Welch Prince Harry might be in line for a reconciliation with his father King Charles but has been warned a “line in the sand” has been drawn over one major thing. It’s been suggested that hopes for a warmer relationship with his father are brewing as Harry prepares for a return trip to the UK – but any dream of returning to any form of ‘working royal’ life is likely not something Charles is open to, a royal expert has claimed. Harry, the estranged Duke of Sussex, is set to visit the UK next month for a ceremony marking the 10th anniversary of the Invictus Games. The …