The resulting scene of the devastation resembled a bomb site and in some senses it was. It was in effect a bomb that you created and detonated.
As a result of your reckless actions you have caused the death of Jamie. You have taken away his life and a large part of his parents and siblings' lives.
The judge accepted it appeared that Partington had a change of heart in blowing up the house when he woke up the next day but said lighting a cigarette was "highly reckless".
"You were aware of the risk but you chose unreasonably to take that risk."
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Nearly 38,000 runners will hope to complete Sunday's London Marathon making it the biggest event in its 35-year history.
Rain across central Britain with longer, intense downpours with thunder in places this evening. A lucky few will stay sunny and dry.
Planning on going to the London Marathon tomorrow? Read our handy guide first!