With some research, I discovered a self-massage video which shows you how to massage the Patella tendon.
I was unsure whether this would work but I gave it a go and I can honestly say it did provide a little relief.
I'm going to attempt to run with the Plums tonight then maybe hit the Gym for some low impact work afterwards. I am feeling very frustrated (no, not like that!) that I'm currently unable to even think about cycling. I'm going to give it another few days then I have to make a decision whether to attempt the RideLondon100 or not.