Thanks for the advice. I am a little squeeminsh and find the thought of an enema of any variety a bit too far for me at present.
I will take note of the over indulgence in water. I have spent a lot of time in very hot climates and have always stuck to the rule that you must pee clear once a day to ensure that you do not get dehydrated. I will now modify that for fasting.
STILL GOT THE DREADFUL HEADACHE THOUGH. I have resisted the urge to take any asprin for it to date but it is pretty bad. It is ok when I am lying down. I diod not get it until I got up this morning.
I have just had a fairly explosive event in the toilet that was very loose indeed. mind you I had not had a bowel movement in 2 days before that.
This is very bizarre, as an Englishman I normally would not discuss these matters with anyone except my doctor under pressure.
This fasting must be going to my head.
You are all being most helpful and patient. Thank you all for your help.