Thanks all. As it was, I think the 'meeting a client' line may have been a bit of gamesmanship, and a means to him getting out whilst underweight.
[ ] He sure did go out last night.
We both weighed in this morning, me at 13st 2.5lbs for a 1st 3lbs loss (now a rather healthy weight for someone 6'3") and him at 11st 11.5lbs for a 1st 1.5lb loss (more healthy for someone 5'7" tall).
Mission accomplished, and both of us rather healthier than we were