Rishi Sunak is considering a crackdown on foreign students bringing dependants and studying “low-quality” degrees after net migration to the UK climbed to a record half a million.

Downing Street indicated that plans to bring overall numbers down could include putting up barriers for international students’ loved ones and restricting admissions to top universities.

This would be in line with proposals being explored by Home Secretary Suella Braverman, who has previously complained about foreign students “bringing in family members who can piggyback onto their student visa” and “propping up, frankly, substandard courses in inadequate institutions”.

Around 504,000 more people are estimated to have moved to the UK than left in the 12 months to June 2022, up sharply from 173,000 in the year to June 2021.

The estimates were compiled by the Office for National Statistics (ONS), which said the jump was driven by “unique” factors including visa schemes for Ukrainians and Hong Kong citizens, and students arriving from outside the European Union.

People arriving on study visas accounted for the largest proportion of long-term immigration of non-EU nationals, at 277,000, or 39% of the total, the according to the ONS.

The Prime Minister’s official spokesman insisted Mr Sunak was “fully committed” to bringing overall immigration levels down and blamed “unprecedented and unique circumstances” for the record high.

The official said: “We’re considering all options to make sure the immigration system is delivering, and that does include looking at the issue of student dependants and low-quality degrees.”

But such moves could meet resistance from other parts of Whitehall.

Chancellor Jeremy Hunt last week insisted that immigration is required to boost growth.

“There needs to be a long-term plan if we’re going to bring down migration in a way that doesn’t harm the economy,” he said.

“We are recognising that we will need migration for the years ahead – that will be very important for the economy.”

The Department for Education could raise concerns over universities’ funding if the number of high fee-paying international students is cut.

Migration from non-EU countries, specifically students, drove the rise in levels of long-term immigration, said Jay Lindop, ONS deputy director of the centre for international migration.

“With the lifting of travel restrictions in 2021, more students arrived in the UK after studying remotely during the Covid-19 pandemic,” she added.