From 6 April 2012, migrants from outside the EU earning less than £35,000 will not be allowed to settle in the UK. Critics have accused ministers of risking patient health in favour of a "crude" immigration policy after government documents revealed that almost half of the migrant nurses will be forced to leave the UK under the new immigration rules.A new UK government impact assessment reveals the change will cut the number of NHS nurses by "hundreds or low thousands" and cost the economy up to £433 million over the next 10 years as people leave.