Image copyright Reuters

Bosses should pay an annual charge of £1,000 for every skilled worker brought in from outside Europe, migration advisers have told the government.

The Migration Advisory Committee report said the proposal could raise £250m to go towards helping train British-based workers in UK firms.

It also suggested raising the minimum salary threshold for skilled workers coming to the UK by £9,200, to £30,000.

Ministers are concerned about the rising number of "Tier 2" migrants.

There are also concerned about companies' reliance on them to fill shortages in the labour market.

As such, the government asked the Migration Advisory Committee - the independent public body which advises it on migration issues - to investigate possible changes to Tier 2 visa requirements.

Currently, those wanting to work in the UK must be offered a starting salary of £20,800. There are some higher thresholds specific to individual roles.

In 2014, 151,000 skilled workers and their dependants arrived in the UK or were allowed to stay on.

The committee said raising the salary threshold to £30,000 would have excluded almost 28,000 people in 2014 - or about 18% of the total.

Image copyright PA Image caption Nurses are likely to be among those affected if the salary threshold rises to £30,000

The committee "strongly" supports the introduction of the so-called Immigration Skills Charge to incentivise employers to reduce their reliance on migrant workers and encourage them to invest in training British workers.

The committee also recommends tightening the rules on intra-company transfers - overseas staff working for the same company in the UK - which have risen "very rapidly" in recent years.

Professor Sir David Metcalf, committee chairman, said: "Skilled migrant workers make important contributions to boosting productivity and public finances, but this should be balanced against their potential impact on the welfare of existing UK residents.

"Raising the cost of employing skilled migrants via higher pay thresholds, and the introduction of an immigration skills charge, should lead to greater investment in UK employees and reduce the use of migrant labour."

Businesses should be "content" that £30,000 was a reasonable figure and the £1,000 charge would be put back into good UK firms, such as Rolls Royce, he told BBC's World at One.

Skills shortages

Neil Carberry, of the business lobby group, CBI, said businesses agreed that training British-based people to do jobs where there were shortages was the long-term solution.

"But the question's more complex than that," he told the World at One.

"We live in a global economy, we have short-term skills shortages, but we also have multi-national companies who frankly can base work in different countries and we want it to be attractive for these big companies to come and invest in the UK and create jobs here."

The immigration skills charge is separate to the apprenticeship levy, due to be enforced in April 2017, which is payable by all medium and large companies.