We'll need to confirm your status for a full 3 year period prior to the start of your course, so for example, if your course started in September, we'd need evidence of your status for the period 01/09/2019 - 01/09/2022.
If your Biometric Residence card was issued within this time, there may then be a gap in the period we require. So, again for example, if your residence permit card was issued on 01/09/2021, we'd then need evidence of your status for the period prior to this, covering 01/09/2019 - 31/08/2021.
You should receive an email from our eligibility team confirming the evidence required and the date period this will need to cover.
Hope this helps,