Up and down Britain, there are over a hundred heritage railway lines mostly funded and financed by volunteers. Locomotives, carriages and rolling stock from the past are lovingly restored to pristine condition and operated. 'Preserved Lines' traces the history of each line from its BR demise to the present day, celebrating the history, the preservation, the restoration and the people involved with some of the UK's finest heritage railway lines. Each fascinating programme visits a specific heritage railway line and offers a unique insight into the considerable efforts necessary to keep that heritage railway operating. Home to the Great Western Society, Didcot Railway Centre is positioned within a small parcel of land, yet finds room for one of the largest collections of locos of any heritage railway group. This centre also plays home to a recreation of Brunei's broad gauge railway and the unique broad gauge locomotive, Fire Fly. Now you too can enjoy the wonderfully preserved Didcot line with this nostalgic look at one of Britain's most loved lines.