We do not usually issue a CAS for resit purposes only, as most resits are submitted online with no in-person requirement to be in the UK. In order for us to issue a CAS, we would need to see that there is an unequivocal need for you to remain in the UK to complete your studies and most resits do not meet this requirement.
If you need a CAS to extend your visa, you should visit our webpages for eligibility requirements and information on how to submit a CAS request.
We will respond to your request within 10 working days.