Foreign postgraduate students on non-research courses will no longer be able to bring family members to the UK, under new immigration curbs.

The announcement has been made two days before official statistics are expected to show legal migration has hit a record 700,000 this year.

Last year, 135,788 visas were granted to dependants of foreign students, nearly nine times the 2019 figure.

PM Rishi Sunak told ministers the move would help bring migration down.

He told the cabinet that the change, to begin in January 2024, will make a “significant difference to the numbers,” according to No 10.

However, the impact it will have on official migration levels is unclear, since students and family members who come to the UK for less than a year are not counted.

Last week, he said ministers were “considering a range of options” to bring migration down, but refused to say what an acceptable level was.

The Conservatives have previously promised to bring net migration below 100,000 a year, but ditched the target ahead of the 2019 election after repeatedly failing to meet it.

Under the announcement, partners and children of postgraduate students other than those studying on courses designated as research programmes will no longer be allowed to apply to live in the UK during the course.

There were 135,788 visas granted to dependants last year, a rise from 54,486 in 2021, and more than seven times the 19,139 granted in 2020.

These figures have increased since study visa requirements for European Economic Area (EEA) students were introduced after Brexit.

Applications have also risen since rules were changed in 2019 to allow foreign students to stay in the UK for two years after graduating to look for jobs.

Home Secretary Suella Braverman said the rise in dependants being granted visas was “unprecedented,” and it was “time for us to tighten up this route to ensure we can cut migration numbers”.

In a statement to Parliament, she added that the move “strikes the right balance” between bringing down migration and “protecting the economic benefits that students can bring to the UK”.

There was a division within government about going further – and possibly banning the dependants of all postgraduate students, including those on research courses.

But some ministers, including Education Secretary Gillian Keegan, argued they were based in the UK longer and provided greater economic benefits.

The BBC spoke to two Nigerian students studying at Wolverhampton University.

Rotimi, who is doing a masters degree in mechanical engineering, says he understands why politicians might want to reduce immigration levels.

But he adds that most of those coming to the UK to study also “look beyond studying” – and want their family to be “part of that experience”.

He says that without a way for overseas students to bring their family, “most people won’t even consider leaving” – or might opt to study elsewhere instead.

As an undergraduate doing a course in mental health nursing, Titilope isn’t in the category of students that can bring dependents to the UK.

However, she says that allowing students to have family with them means they can focus on their studies, without having to worry about whether “they have money, or if they are alright”.

“At the same time, you know that you have the family there. If you’re going through a tough time, it’s always better to have the family to talk it through. You don’t feel so alone.”