Cambridgeshire train stabbing: one suspect held on suspicion of attempted murder; police commend ‘heroic’ rail staff member – as it happened

A 32-year-old man who was arrested in connection with the Huntingdon train knife attack is now being treated as the only suspect, according to transport police

• Cambridgeshire train attack: what we know so far

Some more reaction is coming in.

Kemi Badenoch, the Conservative leader, said she was deeply disturbed" by the reports from Huntingdon.