Ol' Wally's been on my case since the get go, he set up the narrative from the start. We only have his word that the "trap" went down the way it did - for all we know, Wally could have flicked a match or a lighter towards the oven, and set the whole thing off. Plus, the whole thing with the camera - he kept saying he had an alibi, and then promptly ate it in front of all of us.
It's the classic tactic. What's better than setting a trap and being away from it when it goes off, than setting a trap and watching it go off so you can be cleared?
Gregg Wallace.