Locomotives of the Great Western Railway
The first Locomotives of the Great Western Railway (GWR) were specified by Isambard Kingdom Brunel, but Daniel Gooch was soon appointed as the railway's Locomotive Superintendent. He designed several different 7 ft 1⁄4 in (2,140 mm) broad gauge types for the growing railway, such as the Firefly and later Iron Duke Class.
Source: Wikipedia — Locomotives of the Great Western Railway (CC BY-SA 4.0)