London-UK govt to add India to the list of low-risk countries offered a more simplified student visa application process, said Mayor of London Sadiq Khan.In changes to its immigration policy tabled in British Parliament last month, the UK Home Office had announced a relaxation of the Tier 4 visa category for overseas students. There is no limit on the number of genuine Indian students who can come to study in the UK. London Mayor Sadiq Khan pointed to statistics that indicate Indian businesses invest more in the UK than in the rest of Europe combined and employ around 110,000 people in the country.