The concealed spoon sets off the metal detector at the airport in Britain and the teenagers can be taken away from their parents to be searched — a last chance to escape a largely hidden practice wrecking the lives of unknown thousands of British youths.

The British school summer holidays, now well under way, mark a peak in reports of young people — typically girls aged 15 and 16 — being taken abroad on “holiday”, for a marriage without consent, the government says.

The bleep at airport security may be the last chance they get to escape a marriage to someone they have never met in a country they have never seen.