Hip replacement waiting lists are not difficult to manage. Here is one way to do it. Do not worry about the target through September, October or November. In mid December write to the people at the top of the list offering them an operation on Christmas Eve. They will mostly refuse. This resets those patients' "time on list" rating to zero, and the hospital will achieve their hip replacement waiting list target.
I was told this had really happened by a senior orthopaedic surgeon. I haven't tried to verify it.
He apologised for putting hip replacement waiting lists top of the NHS political agenda in 1997 and all the target manipulation that has happened since.