Tube terror blast: Advice from a terrorism expert

An explosion on a rush-hour Tube train in Parsons Green is being treated as a terrorist incident, says Scotland Yard.

The London Ambulance Service says 18 people have been taken to hospital following a blast in a Tube carriage at Parsons Green underground station in south-west London at around 8:20 this morning.

None of the injuries are thought to be serious or life threatening.

Terror expert Dr Sally Leivesley shares her advice for people worried about travelling on public transport.

Anyone who has information that would assist detectives is urged to contact the hotline on 0800 789 321