Britain’s Prime Minister Theresa May answers a question during a news conference with Chancellor of the Exchequer Philip Hammond in London’s Canary Wharf financial district.

:: British Prime Minister Theresa May will on Thursday promise to crack down on immigration from outside the European Union as she unveils the Conservative Party’s manifesto, the BBC reported.

May will promise to “bear down on immigration from outside the EU” by asking firms to pay more to hire migrant workers.

The Prime Minister is expected to announce extra costs for employers choosing to hire non-EU workers for skilled jobs by doubling the Skills Charge.

Under the current scheme, small companies pay £364 ($470, 420 euros) a year in Skills Charge, while medium to large ones pay up to £1,000.

Migrant workers will also be asked to pay more to use the National Health Service, according to the BBC.

The revenue generated will fund skills training for British workers.

May is hoping the new measures will curb immigration from outside the EU to the tens of thousands a year, a pledge the Conservatives have made and failed at for the past seven years.

This is in contrast to the centrist Liberal Democrats party which on Wednesday promised to keep Britain in the European single market and continue freedom of movement.