Gruesome terror manuals were discovered on the phone of a driver by traffic police who were investigating the cause of a minor road accident.

Officers had confiscated the device from Fahim Adam, 32, as he lay in hospital after his Audi car ploughed into a wall, to see if he was texting at the time of the crash.

Unexpectedly, they found two editions of the Isil propaganda publication "Rumiyah" which gave Jihadists tips on how to carry out random "lone wolf" knife attacks to ensure "maximum terror".

The material encouraged readers to find the best type of knives, the best locations to attack victims and the best places to use the knives on a human body, as well as how to credit their attacks to the Islamic State.

Also on his phone was evidence that Adam had seen Isil videos, which showed former soldiers being hanged and beheaded.