She said fines for firms paying migrants less than the minimum wage should be doubled, councils should be given new enforcement powers to target rogue businesses and landlords and more opportunities created for British workers in sectors with high levels of foreign recruitment.

BBC: Yvette Cooper: End student visitor visa loopholes

Currently, just over half of Scotland's councils pay the living wage.

BBC: Dundee City Council proposes 'living wage' for staff

Darren Johnson, a London Assembly Green Party member, said the mayor needed to do more to get councils to pay workers London living wage.

BBC: Most councils not paying 'London living wage'