After the arrest Mr Scott, from nearby St Ives, said the “adrenaline was still pumping”, and when he phoned his daughter Helena, it was a “massive relief” to learn she was not on that train.
Her train had been stopped elsewhere in Cambridgeshire and they made alternative arrangements to get her home.
On Tuesday, British Transport Police, which is leading the investigation, said rail worker Samir Zitouni was still “critically unwell” in hospital.
Rail operator LNER has described his actions as “nothing short of heroic”, after he reportedly protected a girl from being stabbed. Three other people remain in hospital.
