of Train Operating Companies (Atoc) said that although there would be engineering work on the railways, the vast majority of people expected to travel over the Christmas and New Year period should experience no disruption. They added that the number of replacement bus services needed will be almost half that of the festive period last year. Atoc chief executive Michael Roberts said: "A great deal of effort and planning goes into making sure that work to improve stations and make journeys faster and more reliable goes on while minimising disruption for our passengers. "This year, we have again been able to reduce the number of people who will have to get on to a replacement bus. Once again train companies have been working closely with NR to make sure that we keep people on trains wherever we can." WalesOnline, the best source for Welsh news, sport, business and entertainment. Powered by the Western Mail, South Wales Echo, Wales on Sunday and Celtic Weekly Newspapers. Produced by Media Wales Ltd. Contact us . WalesOnline, the best source for Welsh news, sport, business and lifestyle and entertainment. Powered by the Western Mail, South Wales Echo, Wales on Sunday and Celtic Weekly Newspapers. Produced by Media Wales Ltd.