I didn't go for the flat foot study interview after all, I was feeling too rough to make the effort, so they sent me a questionaire instead.
It is about 2 months ago now when I hit 'rock bottom'.
I was sleeping 11 hours a day - awake 2 - sleep 2. When awake I felt weary and breathless.
It had been getting gradually worse for a year. When I told the doc about my sleep problem he said 'drink lots of coffee'.
I lost faith in the medics 20 years ago when I was poisoned by prescription meds, so I knew I would have to find the answer myself - and I have.
The solution was there on the web - deficiency of vitamin B12. My symptoms fitted precicely.
If you google that you will get some NHS 'netdocor'...