In order to qualify for carers' allowance you need to be able to demonstrate that you have been ordinarily resident and present in Great Britain for more than 26 weeks in the past year.
You will not be awarded CA if you are subject to immigration control
The following exemptions allow you to be awarded CA even if you are subject to immigration control:
You are no longer subject to immigration control if you have been granted refugee status, humanitarian protection or discretionary leave.