Police investigate four other knife incidents possibly linked to Cambridgeshire train attack

Questions mount for officers as Anthony Williams, 32, appears in court on charges of attempted murder

Police investigating the mass stabbing on a high-speed train in Cambridgeshire are examining four other knife incidents, alleged to have taken place hours before passengers fled in terror on Saturday evening.

Questions mounted for police as Anthony Williams, 32, appeared in court on Monday charged with a series of attempted murder charges, related to two stabbing incidents.