Disruption on the Thameslink rail service will continue for the rest of Friday, train operators have confirmed.
The Bedford to St Pancras route has been shut due to significant overhead line damage at Hendon and flooding at Balcombe.
East Midlands Trains has now restored services in and out of London St Pancras but will run a reduced timetable for the rest of Friday following severe disruption caused by overhead wire problems in the Hendon area.
Two of the four lines are now available, enabling East Midlands Trains to resume limited services to London from 4.30pm.
Meanwhile operator First Capital Connect said: “Trains on the Thameslink route are expected to remain disrupted for the rest of the day as we do not expect Network Rail to repair the damage today (Friday).
“We advise you not to travel unless your journey is essential and if you have to travel to do so outside the evening peak if at all possible.
“We expect to be unable to operate any trains until at least 06.00 on Saturday.”
No train services are running between London St Pancras International and St Albans.
Customers travelling between Central London and Bedford should use Great Northern services between London King’s Cross and St Neots and replacement buses between St Neots and Bedford - these buses will not run after around 10pm.
After 10pm FCC will operate replacement buses directly from London St Pancras International to St Albans for onward trains to Bedford.