Low-skilled migrants will be barred from permanently settling in the UK under fixed-term job offers as part of post-Brexit proposals to be outlined today by the Government's migration advisory body.

They will only be allowed into Britain to tackle specific shortages in their sectors such as care workers, construction and agricultural workers under the proposed Australian-style points-based immigration system to be unveiled by the Migration Advisory Committee (MAC).

They will have to apply for visas with fixed time limits - potentially as short as a year - under a system that will award higher points for those working in shortage areas, who have job offers and speak and write good English.

All migrants from the EU and the rest of world - apart from a group of those with exceptional talents such as prize-winning scientists or world class musicians - will be subject to the new points system, as freedom of movement from the EU is ended.