A grandfather burned to death inside an industrial oven that baked plastic at up to 280 degrees after he became trapped and the machine was turned on by his future son-in-law, a court heard.
Alan Catterall, 54, from Runcorn, Cheshire, had gone into the oven to fix a fault when operator Mark Francis, not realising he was still working inside, switched the machine on and locked him in.
Mr Francis was engaged to Mr Catterall's eldest daughter, the jury was told.
Liverpool Crown Court heard that because there was no alarm Mr Catterall tried to escape using a crowbar but because of the noisy working environment no one heard his cries for help.
