The Festiniog Railway 0-4-0TT were six 0-4-0 steam locomotives built by George England and Co. for the Festiniog Railway between 1863 and 1867. The locomotives were built to two designs: the first four were originally side tank locomotives and are collectively known as the Small England class; the final two locomotives were delivered with saddle tanks and are known as the Large England class.The designation TT indicates a tank locomotive with a tender. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Mean Of Transportation