Cases emerge after other people tell of change in Home Office policy on passports that has left people scrambling

Two more British teenagers have found themselves unable to return to the UK because of new Home Office border rules on British dual nationals.

Their cases emerged just hours after reports a 16-year-old British schoolgirl was blocked from boarding a flight in Denmark home to the UK because she was a dual national and did not have a British passport. She has missed two weeks of school so far.

A 19-year-old student, Anna*, from Oxfordshire is stuck in Madrid after a university-organised trip to the Spanish capital.

She is part French and had not yet obtained a British passport to comply with the new rules, which require British dual nationals to present a passport, new or expired, or certificate of entitlement to airlines before boarding flights to the UK.