| Lancashire & Yorkshire Railway Hughes 4-6-4T | |
| Powertype: | Steam |
| Designer: | George Hughes |
| Builder: | LMS Horwich Works |
| Serialnumber: | Horwich 1354–1363 |
| Builddate: | March – August 1924 |
| Totalproduction: | 10 |
| Whytetype: | 4-6-4T |
| Uicclass: | 2′C2′ h4t |
| Leadingdiameter: | 3feet |
| Driverdiameter: | 6feet |
| Trailingdiameter: | 3feet |
| Length: | 49feet |
| Locoweight: | 99.95LT |
| Fueltype: | Coal |
| Watercap: | 2000impgal |
| Boiler: | LMS type ‘RS’ |
| Boilerpressure: | 1802NaN2 |
| Firearea: | 29.5square feet |
| Tubesandflues: | 1817square feet |
| Superheaterarea: | 395- |
| Cylindercount: | Four |
| Cylindersize: | NaNx |
| Valvegear: | Walschaerts |
| Valvetype: | Piston valves |
| Tractiveeffort: | 288801NaN1 |
| Trainbrakes: | Vacuum |
| Operator: | London, Midland and Scottish Railway |
| Powerclass: | 5P |
| Fleetnumbers: | 11110–11119 |
| Nicknames: | Dreadnought tank |
| Withdrawndate: | March 1938 – January 1942 |
| Disposition: | All scrapped |
The Lancashire and Yorkshire Railway Hughes 4-6-4T was a class of steam locomotives. They were a 4-6-4T tank engine version of the L&YR Class 8 ("Dreadnought" Class 4-6-0), hence they were known as "Dreadnought tanks".
All were actually built by the London, Midland and Scottish Railway in 1924 after the grouping, albeit at the Lancashire and Yorkshire Railway's Horwich Works.
They had been allocated L&YR numbers 1684–1693, but these were never carried and there was no L&YR class number. The LMS gave them the numbers 11110–11119, and the power classification 5P.
Another 20 of this class were ordered but turned out as further examples of the L&YR Class 8. Orders for an additional 30 were cancelled. Like the Class 8 on which they were based, they were not particularly successful.
Withdrawals started in 1938, with three engines (11112, 11115, 11116), one each in 1939 and 1940 (11113 and 11111 respectively), four in 1941 (11114, 11117–11119) and the last (11110) in January 1942. No examples were preserved.