SHAUN CURRY / AFP via Getty Images Baroness Shackleton, 64, one of the toughest divorce lawyers in the land, has visions beyond the day job. The divorce lawyer who represented the Prince of Wales, Sir Paul McCartney and Princess Haya in their marriage splits is reportedly in the process of developing a ‘relationship suitability app’ for schools to encourage teenagers to analyse and question why they might want to get married young. According to the Times, Lady Shackleton has sponsored research at Exeter University in what is called the Shackleton relationships project. If what she is fun...