The UK government has placed an emergency brake on visas for nationals from four countries, as Home Secretary Shabana Mahmood accused them of exploiting Britain’s generosity to claim asylum. Study visas for nationals from Afghanistan, Cameroon, Myanmar, and Sudan have been halted, as have work visas for Afghans. The government has halted the visa routes as it claims a growing number of people from these countries are using legal migration routes as a backdoor to claim asylum in the UK. The Home Office described the suspension on visa claims as an “unprecedented” step, as it is the first time such visa bans have been implemented. Mr Mahmood said: “Britain will always provide refuge to people fleeing war and persecution, but our visa system must not be abused. “That is why I am taking t...