"It was a gas leak," said Bystander. "Definitely, unequivocally and absolutely."

The blast was initially thought to be a terrorist attack, as this is always the initial thought for any explosion, but this was quickly regarded as improbable, unlikely and untrue as it fits none of the facts.

"It was a gas leak," said Bystander. "Definitely, unequivocally and absolutely."

Although three gas cylinders were present at the Sprout and Cabbage Soup Stall, it is unlikely that these were the source of the blast.

"We think that the blast was caused by a particularly pungent fart," said Bystander. "That particular stall has been the source of a lot of nasty emissions since they set up. We think in this case that a combination of factors combined to make it the final straw."

According to Bystander, the source of the blast had previously had a sweet chili wrap, followed by a baked potato and beans, and finished with a sprout and cabbage soup.

"Our recommendation to prevent this from happening again," said Bystander, "is to prevent the fire eater from performing anywhere near the Sprout and Cabbage Soup stall. Given they're particularly bad at it, we'd suggest they return to their call centre job instead."

Graham