I happen to be near Breakspear Medical (http://www.breakspearmedical.com/files/chronic.html) and became aware of a high profile recovery story from their clinic with Clare Kerr (took 5-7 years).
It doesn't seem like there are any threads on this clinic - has anyone got any information on them or had experience with them?
Their approach is very much 'immune' focused, which I am not up to speed on, although I see similar ideas to those used by John Chia and others about the issues with immune response.
I've done almost every treatment they suggested over a period of about 4 years - lots of different long term abx, CO2 rebreathing mask, low-dose immunotherapy, 30 different supplements. None made any difference at all. I was told I had Lyme but then after 3 years of abx, told I never had it; I was told that I must have food intolerances or allergies as 'everyone with ME had them', and I had thousands of pounds worth of tests which no-one could properly interpret. Each time I went I had to wait between 30 and 90 minutes to see a doctor and they rarely apologised. (I was barely able to sit up at that time and had to ask for a bed to lie on while I was waiting.)