When the knee pain started I was seeing an nhs physio that I had been referred to for sorting out the chronic pain in my hip/buttock. She signed me off in November after seeing me progress from limping to walking normally but not being able to go up steps. She said that she could do no more and thought that I would eventually get better over time. I never managed to progress in the leg exercises that she gave me, they just irritated my knee.
I seemed to start making progress when she got me half price sessions at the local gym and I would do level 1 on the exercise bike, walk on the treadmill and after a month I could use the cross trainer for 10 minutes. If I did no other exercises this didn't aggravate my knee. But 2 months ago the morning after one gym session I couldn't walk without pain below my knee and somehow I had developed fat pad impingement and hurt my tendon.
I saw a new physio that showed me how to tape my knee and said that I should try going down into a squat and staying there with my quads contracted as I had pain when I came up from a squat. I tried this but it hurt my tendon but I agree that it would irritate my upper knee/muscle less when my tendon is better (I think).
The 2nd time I saw him he said he didn't know what else to do, which is what every physio has said eventually ever since I tore my calf, and thats what is so frustrating.

The physio that taught me the muscle energy technique stretch that got rid of the buttock pain, I was seeing him when the knee pain started but he just said that it was because my biomechanics were wrong, weak glut med etc, and pain was to be expected and could give me no advice to make it better. Also he said my right side of the pelvis was rotated forward and my SI joint was stiff one side and flexible on the left side.