GWR Sharp, Roberts locomotives
      
GWR Lion, Atlas and Eagle| | Type and origin | 
|---|
 | Power type | Steam | 
|---|
 | Builder | Sharp, Roberts & Co. | 
|---|
 | Serial number | R, S, and T | 
|---|
 | Build date | 1838 | 
|---|
 | Total produced | 3 | 
|---|
 | Rebuild date | 1844 | 
|---|
 | Number rebuilt | 2 (Atlas and Eagle) | 
|---|
 | 
|  | 
|  | 
The first 19 locomotives ordered by Isambard Kingdom Brunel for the Great Western Railway included three 2-2-2 Sharp, Roberts locomotives. They were built by  Sharp, Roberts and Company and the most successful of the early designs, two lasting until the 1870s.
The original 14-by-15-inch (356 mm × 381 mm) cylinders were replaced from 1844 by larger 14-by-18-inch (356 mm × 457 mm) or 15-by-18-inch (381 mm × 457 mm) ones.
Locomotives
-  Lion (Sharp, Roberts R; 1838–1847) 
-  Atlas (Sharp, Roberts S; 1838–1872)
- This locomotive was rebuilt as a 2-2-2T tank locomotive in 1860. After it was withdrawn it was sold to a Mr Glasbrook in Swansea.
-  Eagle (Sharp, Roberts T; 1838–1871)
- This locomotive was rebuilt as a 2-2-2T tank locomotive in 1860.
References
-  Reed, P. J. T. (February 1953).  White, D. E., ed. The Locomotives of the Great Western Railway, Part 2: Broad Gauge. Kenilworth: RCTS. pp. B10–B11. ISBN 0-901115-32-0. 
-  Waters, Laurence (1999). The Great Western Broad Gauge. Hersham: Ian Allan Publishing. ISBN 0-7110-2634-3.