We've had one thicker poo at tea time, when I say thicker I don't mean normal consistancy just not water.
He's much brighter, more independant and interested in his toys again, so I'd say he's on the mend.
This is backed up by the fact that he is stunt baby, having twice now got down the stairs by going under the stair gate and surfing down on his belly!
So hopefully in the next day or two he'll be totally better.