DETAILS of the Government's controversial points-based immigration system were being published today.

It is likely to make it easier for highly-skilled workers to come to the UK, but more difficult for the low-skilled.

Like existing schemes in the USA and Australia, foreigners will win points for factors including their qualifications, work experience and language skills.

They will have to get a certain number of points to be considered for a work visa.

The points-based system was first announced in February last year.

Home Secretary Charles Clarke will reveal the exact requirements of the new regime for the first time today.

Ministers have already revealed that there will be four tiers of immigrants, divided by their qualifications and work skills and allowing only a temporary stay for some.

The Home Office confirmed in December that it will not be in place until mid-2007 at the earliest.