A female officer is said to have been punched twice to the back of the head

The former batter died on August 4 having suffered ‘traumatic injuries’ during the incident at Esher railway station, Surrey Coroner’s Court heard

A prevention of future deaths report warned there is a risk similar killings could occur unless action is taken

A police investigation was launched after officers were made aware of a video filmed inside HMP Wandsworth in south London.