Rail passengers are being warned of continued delays to trains from Leicester to London this morning after major disruption yesterday.
Problems with overhead wires in the Radlett area meant that trains out of London to Luton were suspended yesterday.
Network Rail carried out repair work last night and services have resumed today.
East Midlands Trains said it plans to run its regular timetable, although there are currently delays on peak services as a result of further engineering work being carried out by Network Rail this morning.
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A spokesperson for East Midlands Trains said: "We would like to apologise to passengers for the severe disruption to our services yesterday which was caused by a serious overhead wire problem.
?Network Rail engineers carried out repair work overnight to allow us to restore services this morning."
East Midlands Trains tickets that were not used yesterday are also valid for use today.
For information on alternative routes click here for details on alternative routes.
See the East Midlands Trains website and National Rail Enquiries sites here:
Follow Twitter updates here: @NRE_EastMids