As many have said, this is Chronic Arthritis, some painkillers help a bit, but a hip replacement is the answer, dark and bl**dy painful night into glorious day!!
I had to wait over 2 years from first diagnosis to getting the op, moving gradually up the pain threshold and the Queue! And I think that's fairly standard?
The Op itself is quite simple, like carpentry they said, BUT if you have any choice, it's better done at one of the Orthopaedic specialist depts, as they do hips and knees all day, with the occasional shoulder, back, wrist or ankle for a bit of variety. A more general surgical dept will be less used to hips. And the procedure itself, well, if the op is on day 1, you should be out, all being well and body responding, on day 3.
IF the wait for surgery is a problem, you could go private -- assuming the cost (perhaps less than you think?) isn't an issue?
OH, and one KEY THING >>>> after the Op, DO all the exercises they tell you, religiously, and DO EVEN MORE than they say. Your muscles will have had quite a shock, and those exercises are vital to getting things back to normal asap. I could walk without a stick in about a week.