IT'S GONE UNDER !!

Found out Isobel's poo strategy, she waits till shes got absolutely no choice whatsoever and the head is showing before she goes. In the meantime she spends all day on and off the loo because she obviously feels like she wants to go, but when shes on, the feeling subsides, gets off... minute later back on again... then off... and so on.... phew
(ps: "it's gone under" is what she says if the richard disappears down the u-bend)