Some courses require you to obtain Academic Technology Approval Scheme (ATAS) clearance from the UK government before applying for your visa. If this applies to you, Admissions will email your ATAS statement to you along with instructions on how to apply. The earliest this will be sent is six months before your start date.
You can find more information on the UK Government’s ATAS webpages.
If you need clearance from the Academic Technology Approval Scheme (ATAS), it will be confirmed in your CAS. If you are a non-EEA or Swiss national planning to undertake study in the UK in certain science, engineering or technology disciplines, then you will need to obtain an ATAS certificate before you can apply for entry clearance or a visa extension. The application is made online at: https://www.gov.uk/guidance/academic-technology-approval-scheme
In the application you will be asked to include a statement outlining your area of research. This statement must be the same as the one held on file in your school and agreed with your supervisor. It will be issued to you by the Admissions Office once you hold an offer. An ATAS certificate is valid for six months only and if it is not used within this time, new clearance must be obtained before you make your visa application.
Generally, ATAS applications will be processed within 20 working days from the date received, but allow plenty of time to get the certificate before your visa application. Your visa application cannot be processed until you have received ATAS clearance. If your research changes during your studies, you are required to obtain new ATAS. If you wish to transfer to a course which requires ATAS clearance, you are required to obtain clearance before your transfer can be processed.