Thousands of people will struggle to get home from work in central London tonight as a power failure at Radlett station has disrupted the train service.
First Capital Connect said it is unsure when a full service between Luton to St Pancras – which runs through Hendon and Mill Hill Broadway – is expected to be resumed.
The power line collapsed just after 11am and passengers – some who were travelling to get a flight from Luton airport – were left stranded on trains.
People took to Twitter saying it was a 'shock' nobody was injured when the freight train pulled down the over head wiring.
Trains travelling from the north will terminate at Bedford or Luton, and trains coming from the south will terminate at West Hampstead.
First Capital Connect services from Sutton and Sevenoaks will start and terminate at London Blackfriars or London Victoria.
Rail replacement bus services will stop at Mill Hill Broadway and Edgware tube station.
Passengers on First Capital Connect, East Midland Trains and Southeastern services can travel on any other reasonable route.
Sam Kelly, a spokeswoman for Network Rail, said this would not be a “quick fix”.