Three teenage bullies who killed a woman by pushing a firework through her letterbox after attacking her son have been jailed.

Mary Fox, 59, died in the fire in Bodmin, Cornwall on Bonfire Night last year after the Silver Dart was thrust inside to "frighten" the family as part of a prank.

Her son Raum, then 17, escaped through a window of the blazing council home in Wallace Road, but his mother died of smoke inhalation.

Owen Hewitt 18, and Samuel Luckes, 17, were each jailed for seven years at Truro Crown Court for the manslaughter of the mother-of-nine. They were also each sentenced to three years concurrently for committing arson while being reckless as to whether Raum's life was endangered.

The pair "laughed and joked" that the burning house belonged to Raum's mother, the jury heard earlier.

A third teenager, Ryan Croft, 18, who pleaded guilty at an earlier hearing, was given five years for manslaughter and two years for arson, also running concurrently.