Family learned of change while abroad, and fear dual-national children will have to stay with relatives while they return to apply for passports

A British man and a Danish woman fear they will be separated from their young children in Copenhagen airport because of new border control rules on British dual nationals.

James Scrivens and his wife, Sara, who live in Wales, were visiting relatives in Norway and Denmark during the school holidays, and learned about the new Home Office rules only while they were abroad.

Under the rules, dual nationals risk being denied boarding if they do not present a British passport, current or expired, or a “certificate of entitlement”, costing £589, attached to the passport of their second nationality, to prove their right to enter the UK.

On Thursday the migration minister Mike Tapp dismissed as “absurd” claims that the government had failed to properly communicate the new rules.