Train users are being reminded there will be a reduced service in and out of London over the festive period.
First Capital Connect (FCC) has released information about its festive timetable and has reminded people to keep up to date with services online.
Today, Christmas Eve, there is a normal service operation for most of the day, with some trains on the Briton route having additional carriages and last trains from London leaving around 10pm.
For Christmas Day and Boxing Day there will be no service but FCC tickets will be accepted on Green line coach services between London and Luton Airport on December 26.
On Thursday December 27, Friday December 28, Monday December 31, will all run with a revised Saturday service.
For New Years Eve there will be extra services running into the early hours of the morning with free travel from central London from 11.45pm on the 31 December 2012 until 4.30am on 1 January 2013.
Managing Director Neal Lawson said: “We know visitors and customers enjoy a night out in London in the run up to Christmas, so we have laid on extra services and longer trains late at night to Peterborough and Cambridge to make their journey home easier.
“And for the third year running we are also offering our customers a free ride home overnight on New Year’s Eve.”
It has also been announced there is major engineering work planned on Tuesday January 1 on the Hertford route and at Hadley Wood, New Barnet, New Southgate, Alexandra Palace, Hornsey and Harringay.