You're welcome Colin, hope you gets somewhere with the GP.
I also have pains in my hip joints when I have been lying on either side, I thought it may have been busititus, which I have had before and had to have physio on them couple of years ago. At the time the GP said it was inflamation of the burser sack that protect the joints. The pain is bareable at the moment whereas before it was really painful.
Lets me know how you get on!