Great Western Rail services will run normally on 23 December. On Christmas Eve late afternoon and evening, services will be amended to prepare for the closure on Christmas Day and Boxing Day (Heathrow Express trains will continue running on Boxing Day).
There are no planned improvement works between Christmas and New Year. London Paddington remains open and services to London will operate normally throughout.
If you are travelling via Bristol Temple Meads or Gatwick Airport there are some local changes from Sunday 27 December which can be checked on the Christmas travel page