Overview
- British Transport Police responded just before 10:30am to reports of three young men fighting with knives at Colliers Wood on the Northern line.
- London Ambulance Service treated a man for a head injury and took him to hospital after being called at 10:29am.
- A man in his 20s was arrested at the station on suspicion of possessing an offensive weapon and was also taken to hospital, with injuries not thought to be life‑threatening or life‑changing.
- Transport for London shut Colliers Wood for investigations, triggering severe Northern line delays that later eased to minor northbound disruption via Bank.
- Officers have appealed for information and witnesses to contact BTP by texting 61016 or calling 0800 40 50 40, quoting reference 211 of 17 December.