Rail passengers using one of the UK's main stations were hit by knock-on delays across Saturday morning after a "trespass incident" the day before.
On Friday evening all services into London Euston were halted as emergency services helped someone near Wembley Central station.
British Transport Police said a male had been "taken to a place of safety".
Earlier National Rail was advising passengers to avoid using services in or out of Euston until at least midday.
The disruption has now ended.
Power was cut on some trains, with one commuter describing how passengers were stuck on a train during Friday's stoppage.
Ive been stuck on an airless, humid train just north of #Euston for well over an hour. They’ve now had to turn the emergency power off to ensure enough electricity to restart the engines when the time comes. Crew now giving out emergency light sticks. This is ridiculous. pic.twitter.com/zaK4ny28Zm— Emma Dunn (@MrsEmmaDunn) October 25, 2019
London Northwestern Railway, London Overground, Southern and Virgin Trains were all affected.
National Rail had said on Friday night anybody who had been unable to travel could use trains on Saturday for no extra cost.