plank.....
I'd like to call one item of BS here, my brother has sprayed deodorant to such a degree it was pooling in his hand and it didn't explode. I feel it's unlikely...
Some aerosols use butane as the propellant, so a lighted match could cause a small fire. Maybe he's been pouring petrol down the toilet - surprisingly common iirc.
As one of the people quoted was the local fire chief from Essex - there's a high chance that the report was accurate.
What I'm thinking is it didn't go boom, rather woof!
I suppose there's not much difference really he still got burnt