I decided that I couldn't cope with fasting for a whole day, the hot flushes and dizziness I suffered when I tried it were slightly unpleasant, so I have adapted my "fast days" into low calorie, meat and alcohol free days instead. And thus far its working.
official "fast" days are breakfast and supper, with nothing in between,
and a max of 500 calories, my "fast" days are breakfast, lunch and tea
with a max of 800 calories. OK I'm not losing weight fast (no pun
intended) but I am losing. And also I'm pretty sure that two
alcohol-free days a week are not doing my liver any harm, and two
meat-free days are a start on changing eating habits, on paper I think
vegetarianism is a good thing, but I like my meat too much to give it up
altogether just yet.
I am finding the regime is relatively easy,
Mondays and Thursdays are my usual low-cal days, but when circumstances
dictate (as when having family to visit for a few days) its easy enough
to move one or the other, or both, to suit. So, I'll be sticking with it
for a while, at least.
Come back at the end of August for another update.