For 12 years, Sally Lane and John Letts have been fighting to bring their son Jack - held in Isis prisons in Syria and Iraq - back home to Oxford. They tell the story of how their lives fell apart to chief international correspondent Bel Trew On The Ground newsletter: Get a weekly dispatch from our international correspondents Get a weekly dispatch from our international correspondents Get a weekly international news dispatch Email * SIGN UP I would like to be emailed about offers, events and