A NEW passport rule introduced earlier this year has already caught out a number of families.

As many as 1.2million people can to enter the country.

A person in a blue suit holding a Malta passport.Brits who hold two passports can no longer use their foreign document to enter the country Credit: Alamy A hand holding a British passport against a backdrop of a beach and ocean.The change was predicted to affect around 1.2million Brits Credit: Alamy

These came into play in February and mean that British nationals have to carry a valid British to return to the UK.

They can no longer use their foreign passport to enter the country.

An alternative is to have a “certificate of entitlement” costing £589.

Despite being in place for five months, the new rules have been catching people out.

In one case, a and missed six weeks of school – she was unable to return home for over a month.

The 15-year-old girl had been visiting her grandmother in in April of this year.

When it was time to return home, she was turned away at the airport because she didn’t have a valid British passport.

The girl’s father sought help from the and the Foreign Office.

He told The Guardian : “The embassy, the Home Office and the Foreign Office bounced us from one to another.

“They are playing with people’s lives, a child’s education. It is loathsome.”

A woman holding a toddler and a newborn baby.Colette was returning to the UK for a wedding but was refused boarding with her children Collage of travel items including a plane, sunscreen, passport, suitcase, and plane tickets, advertising The Sun's travel Instagram account.

Eventually, she was issued with an emergency travel document.

In another case, one when she was trying to travel from to with her two children.

Colette Bjorn-Alderson, who has lived in the UK for 28 years, had been in the Danish country since April, but was returning to the UK with her six-week- old and 23-month-old for a wedding.

However, her two children only had Danish passports which meant they didn’t have valid travel documents for returning to the UK.

She told The Times that she felt “unwelcome in my own country” after being turned away from the flight.

Colette sent photocopies of her documents to the Home Office – but ultimately the decision was made that the family could not fly.

In June, dad-of-two, Kyle Harris, was from Kefalonia in back to the UK due to only having an American passport.

The 39-year-old had been onwith his wife and two sons and the family has had to extend their time away as a result.