Well, I started losing weight sometime in April. I reckon it was the start of April. I've been measuring my weight periodically in May and I lost a lot before I started. Usually, you lose more in the first couple of weeks, but I've run the line of best fit as a straight line back through the points:
This graph suggests that I've lost 12 kilograms. That's 26 and a half pounds. Today I crossed a stone boundary, the first time I've properly done that since I've been measuring (the first measure was exactly on a boundary).
I'm very heavy, but it's going the right way.