如果是中国国籍，拿PR，去读PhD，需要ATAS（Academic Technology Approval Scheme）吗？
看Guidance，中国国籍的是需要申ATAS的。但实际上ATAS是用于visa的。
如果不需要签T4，还需要去申ATAS吗？
no ATAS
If you are none of the above categories:
if you are coming to the UK as an academic visitor you do not need an ATAS certificate
if you are coming to the UK to do research that is not linked to any studies you do not need an ATAS certificate
If you are applying for an extension to stay for the sole purpose of writing up your thesis and your previous Visa did not require ATAS clearance and was issued before 30 November 2007, then you don’t need an ATAS certificate. If your Visa was issued after the 30 November 2007 then you will require ATAS clearance for writing up your thesis
if you already have a valid visa you do not need to apply for an ATAS certificate unless you need to apply for an extension to stay in the UK in one of the above categories
you are studying a PGCE or Postgraduate Diploma