Hi JJ, yes it was I, Barsel that is waiting for both knees to be replaced.
I was offered the operation a year ago but turned it down so I could try other things like acupuncture, steroid injections and physio but to no avail.
Now I am back on the waiting list wishing I had had it done a year ago. I've gone from struggling to walk to hardly able to walk at all as both knees are now constantly giving way.
I'm pretty sure you will be offered injections first and I can tell you that sometimes they last from several months to a year or not at all.
It probably depends on how bad your knees are, and in my case the injections don't work at all now.
Also, I don't know if Sqad will agree with me here but the injections you get at the hospital are superior to any that your GP can give you, I know that from experience and also because the Consultant told me.
Let us know how you get on.