So, he looks well over three hundred pounds. Would that be accurate, since I don't know what one stone equals?
Well over four hundred pounds. He was twenty nine stone twelve pounds at his peak, apparently. That is 418 lb.
His weight was something to do with an illness, though I don't know the full details.
He said it was glandular IIRC. Which is possible, though a lot was obviously for other reasons. He lost a lot of weight some point after leaving parliament if recent photos (and his age at death, frankly) are anything to go by.
418 is being generous, imo. He looked about 5 bills in those pictures.