Hi, nutty: I have lupus but not the other conditions you have, and I'm in the US, so I'm not sure how much help I can be to you in the UK as far as info and advice goes.
I just turned 50 and I first started showing symptoms of lupus 28 to 29 years ago, though it took a while for the docs to diagnose it correctly as SLE (Systemic Lupus Erythematosus), and longer to find a doc who could treat it effectively. Over the years they've put me on any number of different medication but, at the moment, I'm doing very well with it and have not taken any prescription meds for it for several years. I still get regular blood tests to monitor the white blood cell counts, etc.
Ten years ago I was diagnosed with sarcoidosis, another auto-immune disease. I grew nodules in my lungs, and the disease can produce nodules in other major organs (like the heart and the brain) too. When one's immune system is not up to snuff, it can allow all sorts of weird stuff to happen to one's body!
Anyway, I certainly empathize with your immune-system problems, and am certainly available to chat about lupus if you want to do so. Feel free to PM me as needed.