The rail line between London and Luton has reopened after damaged overhead wires created "major disruption" at St Pancras train station, a rail company said.
Trains were unable to run between the two stations until after midday on Sunday due to the damaged wires in north west London.
East Midland Trains, which uses St Pancras as its London terminus, told customers that if they were already using alternative routes, their tickets would still be accepted.
The company advised passengers on how to claim compensation if they were delayed by more than 30 minutes.
In response to earlier the travel disruption, one passenger on Twitter said: "Utter chaos at Luton station, poorly organised, told to wait at 1 stand for rail replacement bus, been here over an hour & at front of queue."
Another said: "We're standing at Luton and no one is telling us anything? Are we getting to London today?"
The line closure comes two days after disruption at Britain’s busiest rail station on Friday.
London Waterloo was closed for the start of the morning rush hour due to overrunning engineering works for the second time in four months.
Later, that day a signalling failure at Milton Keynes caused chaos on the West Coast main line, with dozens of trains cancelled or seriously delayed.
Additional reporting by PA
