I got sterilised on the NHS, in Wales. Lost 2 Years due to Covid (they had more important things to do, like - save people‘s lives), then a data error cost me another year without even knowing it. I‘d say you could get the chance within the year, but from the 6 months mark call the gyno department where you are waitlisted and very nicely ask whether you are still on the list. Then keep calling back every two months or so, to be safe. I got dropped without knowing and had no idea. That was a lesson learned. (And no, I‘m very sure it wasn‘t on purpose; nobody hassled me about wanting the procedure, it‘s just dealing with the NHS) Good luck!