I am more than ever, encouraged by the advice of Dr Myhill.
I have been taking her recommended supplements for 2 and half months, using her ideas on pacing and exercise. Because I dont live in the UK I couldnt become her offical patient and have Vit B12 by injection. However 2 weeks ago I persuaded my own Dr in Spain to give the B12 injections a try.(I translated Dr Myhill's recommendations for Vit B12 for her to look at). If she hadnt offered it, I was quite prepared to try Vit B12 in a sublingual form. I also showed my Dr info from Prof. Martin Pall who has conducted studies showing that high levels of nitric oxide tend to be responsible for many of the symptoms of chronic fatigue while vitamin B12 is a powerful nitric oxide scavenger.
In the last 2 weeks, despite a viscious viral infection I got before the injections began, my old energy has been creeping back. For example, for the last year a shopping trip used to leave me exhausted for up to 3 days afterwards, as did any socialising, and working outside the house. But now I can go shopping (up to 2-3 hours) with no really adverse affects. OK a small advance, but it has stopped me feeling almost housebound. I can work around the house and garden with no ill affects most of the day now, except not in the hot sun. I can also do a bit of socializing, but not for long yet (2 hours max).
Perhaps I'll never have normal levels of energy again, but I do feel and look better than I have for ages. I have even started a correspondence course in Interior Design with the idea I could take a degree this way if I really wanted to... ie to read and work in my own time. Hope this helps someone else.
see useful site below about Vit b12 deficiency
http://www.b12d.org/content/what-causes-b12-deficiency