The program of upgrades provided new tracks, new and longer platforms, new lifts and footbridges at stations, upgraded signaling equipment and electrification equipment to allow cleaner, faster electric trains to run.
At more than £100m, the festive investment program was the biggest ever carried out by Network Rail and was planned in conjunction with train operators to minimize the impact on passengers during what is traditionally one of the quietest periods for rail travel.
Hundreds of engineers from Network Rail and its suppliers worked the equivalent of more than 600,000 hours at more than 100 locations across Britain over the period, often in extremely difficult weather conditions.
Highlights of the work completed include:
A new platform, track and signaling equipment at Gatwick Airport station. Around 1300m of track was laid, a 50m footbridge was renewed and 250m new platform, complete with a new lift, escalators and high-level walkway to the station was completed.