Tube bosses will be doing everything they can to make sure shoppers can get in and around London during the Boxing Day train drivers' strike.
Transport for London (TfL) said services would be operating on most Underground lines but warned passengers that disruption was likely.
The train drivers' union Aslef is stopping work on Boxing Day in a strike that has already led to the Premier League London derby between Arsenal and West Ham United being postponed.
TfL said they condemned Aslef "for completely unnecessary disruption to Londoners on Boxing Day" and said they were "making every effort to minimise disruption and to support the economic life of London".
The strike, and two further walkouts on the last two Fridays in January, is over a long-running row about bank holiday pay.
Extra buses will be laid on for those travelling to the West End, as well as the Westfield shopping centres in Stratford, east London, and White City, west London, TfL said.
The congestion charge will also be suspended but suburban rail services and the Overground would be suspended on Boxing Day.
But there would be some services operating on Southern and South Eastern trains into London Victoria and London St Pancras International stations as well as on the Gatwick Express and Stansted Express.
TfL urged shoppers to consider walking into the West End from either Victoria or St Pancras, which would take about 20-25 minutes.