He couldn't burn him upstairs. The instrument would get cold.
Couldn't JB have simply held a lit match or butane lighter against Nevills flesh to see if he was alive? Or even poked him with a needle which would leave no trace?
Why would JB go to the work of heating anything up, seems over the top!
And as we have discussed before, why did it take three burns to get a reaction instesd of only one?
The more I think about it the surer I am that the Aga made the burns, its the only rational explanation!
Bubo suggested it years ago, and then Philip Boyce as good as replicated the marks with his experiment after JB and Yvonne Hartley pointed out the possibility to him!
Yes, if the burns were inflicted on the night of the murders, they were made purely by accident by the Aga handles!