The Manchester–Preston line runs from the city of Manchester to Preston, Lancashire. It is largely used by commuters entering Manchester from surrounding suburbs and cities, but is also one of the main railway lines in the North West and is utilised by TransPennine Express regional services and to Scotland. It was announced in December 2009 that the line would be electrified, following an announcement in July 2009 that the Chat Moss line between Manchester and Liverpool was to be electrified first. The electrification work for this line commenced in May 2015 and was due for completion in May 2018, but was delayed until December 2018.