"It gave some witnesses the confidence to come forward and talk about their concerns, " said Det Supt Meynell.

BBC: Derby

But while the police's case was ultimately successful, Det Supt Meynell remains sorrowful.

BBC: Derby

Det Supt Kate Meynell, of Derbyshire Police, said the Philpotts and Mosley had "lied throughout the investigation and court case".

BBC: Derby fire deaths: Philpotts and Mosley jailed