Preston, who was born in June 2022, was taken into care at five days old following an emergency care order by Oldham Council.
He was placed with foster parents, remaining with them for the first nine months of his life.
Preston’s mother, Sarah Davey, now 42, had been jailed at the age of 14 for the murder of a frail pensioner in 1998 and had been in and out of prison since then.
Varley and McGowan-Fazakerley were approved for adoption in January 2023 and Preston began living at their home in Blackpool in April, when he was nine months old.
But during the four months he was in their care, he was routinely ill-treated, sexually abused and physically assaulted, suffering 40 traumatic injuries.