Isabelle was subjected to "sadistic" violence and sexual abuse before her murder, a court hears. Mum Alexandra Walker and her boyfriend Harrison Simpson have been jailed for life after murdering two-year-old Isabelle Welsh, who was also sexually abused by Simpson Key points and original sources are listed below.

• Isabelle was subjected to "sadistic" violence and sexual abuse before her murder, a court hears.S1

• Mum Alexandra Walker and her boyfriend Harrison Simpson have been jailed for life after murdering two-year-old Isabelle Welsh, who was also sexually abused by SimpsonS2