Just to add that I am still, apparently, excreting more than I am eating. At the moment I seem to be losing just under a pound a day without any major change in diet (apart from the lack of the daily Guinness). I was pushing 12 stone 4 when we got back. I am now 11 stone 13.4 pounds and waiting for the weight to stabilise. So people who in the past who have accused me of being full of sh*t may have a certain amount of truth on their side at times. Hopefully not for much longer.
I find double cream does it for me. Increasing fat intake will increase bile secretion into the lower intestine, and this is a natural lubricant. It will also help prevent, even remove, gallstones (which are a direct hazard of a low fat diet, by the way)