Anthony Orchard QC, for Mick Philpott, asks Matt Lee: "Do you agree it's impossible to determine how petrol was introduced to the hall?"
Matt Lee replied :"Yes."
Anthony Orchard QC: "You're not able to say whether or not petrol was deposited through the letter box are you?"
Matt Lee: "No."
Prosecutor Richard Latham QC: "If petrol was deposited on the doorstep, what would you expect to find?"
Matt Lee replied: "I would have expected to find petrol on the concrete step."