The UK government is introducing an immigration health surcharge on 6 April 2015. The health surcharge will be paid by non-EEA nationals who apply to come to the UK to study for a period of more than 6 months. It will also be paid by non-EEA nationals who are already in the UK and apply to extend their stay after 6 April 2015. The charge will be £150 per student and per dependent (should there be any) per year of study, payable at the time of visa application. If the surcharge is required, but not paid, the application will be refused or treated as invalid and rejected.
Guidance is available on www.gov.uk/visas-immigration from 6 April 2015.