More than 200,000 children will be reached to ascertain the value of the trauma training.

The 30 organisations have written to prisons' minister, Damian Hinds, to express "grave concerns regarding the children’s secure estate".

With the exception of Parc Young Offenders Institution, incidents of violence remained high in most YOIs, says inspectorate's annual report.

A package of urgent measures to improve safety and rehabilitation at HMYOI Cookham Wood has been outlined by Prisons Minister Damian Hinds.

The number of former offenders who have gained employment within six months of release has more than doubled from 14% to 30% since April 21.

Children in prison placed a long distance from their home are missing out on family visits, the HM Inspectorate of Prisons has warned.

The Chief Inspector of Prisons has urged the Urgent Notification process to be introduced at HMYOI Cookham Wood following inspection.

Young people from ethnic minority backgrounds are less likely to receive appropriate support when they transition into adulthood.