TfL have announced as part of their festive travel guide that the congestion charge will be suspended between 24 December and 2 January.
Travel on New Year's Eve is free, courtesy of Diageo, but there are also a number of other changes to road, rail and river services which travellers should check out before deciding to embark on any journeys over Christmas. A few weeks ago, we highlighted a number of closures due to planned maintenance and this seems like a good time to remind readers that the timetable can be found here. Bear in mind too that rail union ASLEF recently balloted members over strike action on Boxing Day so even the service currently advertised may change.
For the full details of what services are available, see TfL's leaflet here (though at 24 pages it seems more of a booklet than a leaflet). For changes to rail services into and out of London, see the National Rail website which lists individual train companies in one handy page. For anyone driving into central London, check the website of the relevant borough for parking regulations as these change from borough to borough and can be fiendishly complicated, for example, Westminster council will be enforcing double yellow lines on the 25th, 26th and 27th but not single yellow lines.