A train passenger’s barking dog saved the day for him by apparently causing a “marauding” knifeman to run away, as another traveller said the attacker who stabbed 10 people on the service had the “greatest delight on his face”, a court heard.

Raza Aslam, who was travelling on the London-bound LNER service, heard people say a man was saying “the devil won’t win”, before he spotted 33-year-old Anthony Williams with a knife, Cambridge Crown Court was told on Thursday.

Prosecutor Christopher Paxton KC said car delivery driver Mr Aslam grabbed a frying pan but was stabbed in the hand by Williams on 1 November last year and felt an “immediate loss of energy from his arm”.

Mr Paxton said Samir Zitouni, who was working on the train that was stopped at Huntingdon , Cambridgeshire, responded by throwing things at the defendant and “saved” Mr Aslam’s life.

The prosecutor said Mr Aslam told police Williams “had the greatest delight on his face”.

Mr Aslam said: “I saw his eyes expand with pleasure.…