A new exhibition at Steam - Museum of the Great Western Railway, Swindon - lifts the lid on the rivalry that drove the big four railway companies in the early 1900s to be the fastest.
Time on Trial, takes a look at the exhilarating speed trials that took place between the GWR and other railway companies between 1910 and 1948.
In 1910, a Great Western Railway Star Class engine entered a race against a London and North Western Railway Company Experiment Class engine. The competition was held to determine who had the fastest locomotive. This was the first officially-recorded time trial between locomotives from different railway companies.
A collection of images and rare archive material from the Steam collection are used to illustrate the story of locomotive time trials.
Steam is open 10am-5pm Monday to Saturday and 11am - 4pm and on Sundays.