channels was provided via listing booklets, which were available on board. Headphones were necessary to listen, which could be purchased at the shop. During March 2010, this system was replaced by onboard WiFi provided by mobile operator T-Mobile. First class passengers were provided with a 240 volt mains power socket at each seat. The Pendolino uses an electronic seat reservations system. Each seat has a small dot-matrix LCD installed near the top. If the seat has been reserved, the display shows the station the seat is booked from until that station has been passed: after that point, it displays "Available unless occupied". The display can also show the name of the passenger if this has been entered at the time of booking. This information is provided by the onboard Train Management System (TMS), which downloads current data via mobile operator Vodafone’s wireless network from the national Customer Reservation System shared by all train operators. The TMS is also used to provide route information to the passenger visual information systems. If a train is rescheduled, the system can rapidly be updated and the displayed information changed to reflect the new schedule. Consist The original 53-unit Pendolino fleet was delivered in nine-car formation, with vehicles built at the former Metro-Cammell Washwood Heath plant (by then owned by Alstom), in Birmingham. Thirty-one units were later extended to 11-car formation, with the addition of two new carriages (the 653xx Trailer Standards and the 689xx Motor Standards), built by Alstom at Savigliano in Italy. Units that had been extended were renumbered into the 390/1 range by having 100 added to their original unit numbers (for example, 390003 became 390103). Four additional Savigliano-built 11-car units (nos. 390154–390157) were delivered at the same time, to support service enhancements. The last two digits of the vehicle number (xx) match the last two digits of the number of the unit to which the vehicle belongs. Operations The service introduction of the Pendolino was repeatedly delayed, a fact which has been attributed to the poor project management and the collapse of infrastructure owner Railtrack. The fleet was introduced into passenger services from to on 23 July 2002 to coincide with the opening of the 2002 Commonwealth Games in Manchester. During the Games, they operated a daily return service between the two cities, however, it was not until 27 January 2003 that the first Pendolino carried passengers between and Manchester Piccadilly.