
I have been living in the UK for over a decade. My partner is British. I'm finally seeking British citizenship

My question is about residency proofs. I have been told by the immigration office that council taxes could be used as proof.
I'm however confused. I thought I had to prove that I had been in the UK exactly 3 years prior to the application. Council taxes are annual. Do they simply assume one was there the entire year?
I was planning to use bank statements to cover specific days. But that doesn't seem to be possible.
Could anyone shed some light on this?
Thanks in advance
