The Home Office can decide to stop a Student sponsor from issuing any confirmations of acceptance for study (CAS), even if the sponsor remains on the register of licensed Student sponsors. This is usually called a zero CAS allocation.
If this happens to your sponsor, but you already have a CAS, you can still use that CAS to make an application under the Student route in the normal way. Your Student application will not be held or delayed, unless the Home Office decides to remove your institution from the register of licensed sponsors.
Students who already have Tier 4 or Student leave and who are sponsored by an institution that now has a zero CAS allocation may continue with their studies, and they may enter or re-enter the UK using that leave. If you need a CAS in order to apply for Student leave, you cannot make this application unless or until your sponsor is allowed to assign CAS again.
We advise all students studying at (or planning to study at) an institution with a zero CAS allocation to monitor the situation closely by keeping in touch with the sponsor. See our guidance on what will happen if the institution is later removed from the register of licensed Student sponsors, or if the Home Office revokes its sponsor licence.