Eurostar and Southeastern trains have been cancelled because of flooding a tunnel near Ebbsfleet International station in Kent.
Southeastern Railway said no services will run between Ebbsfleet and London St Pancras International until around noon.
Eurostar, which uses the same line, has cancelled the first three services of the day to and from St Pancras.
Respected travel journalist Simon Calder reported that: ‘London St Pancras International is in chaos.
All Eurostar and Southeastern trains this morning cancelled due to flooding in the tunnel beneath the Thames. Many Thameslink services cancelled due to staff shortage.’
Eurostar services are not running from St Pancras this morning due to flooded tunnels (stock image)
One would-be passenger, Parker Winston, wrote on X – formerly Twitter – that she had got up at 3.40am on her way to catch a Eurostar service, only to be forced back to bed after a frustrated journey.
The latest trains crisis comes after British holidaymakers were held to ransom before Christmas, when French staff on Eurotunnel staged a wildcat strike, walking out as they demanded bonuses be tripled.