<p>The dual national, who missed six weeks of school, is latest of several children affected by recent Home Office policy</p><p>A British girl was prevented from returning to her school in the UK for six weeks after a trip to see her grandmother in Italy because of the Home Office’s new rule requiring dual British nationals to have a British passport to get back into the country.</p><p>The 15-year-old, who was stranded in Rome in April, is just <a href="https://www.theguardian.com/politics/202