• Prince William, 38, and Prince Harry, 36, ‘have five months to heal their rift’ 
  • Royal expert said the relationship between brothers may never recover 
  • Robert Lacey revealed: ‘I no longer rate highly the chances of reconciliation’
  • Comes after reports William will be named Captain General of Royal Marines
  • Prince Harry held role since 2017 but was stripped of military roles in March 
  • Robert said Prince William taking on the role would ‘be the end of’ relationship