6229 was built in September 1938 at Crewe, at a cost of £11,302, as the tenth member of its class and the last in the second batch of five red streamliners, complete with gold speed cheat stripes. In 1939 6229 swapped identities with the first of the class 6220 Coronation and was sent to North America with a specially-constructed Coronation Scot train to appear at the 1939 New York World’s Fair. There was therefore for a while a blue 6229 Duchess of Hamilton in the UK and a red 6220 Coronation in the USA. R.A. Riddles drove for most of the tour, owing to the illness of the assigned driver. The locomotive (though not its carriages) was shipped back from the States in 1942/3 after the outbreak of the Second World War, and the identities of the locomotives were swapped back in 1943(the carriages returned in 1946).
In 1943 it was fitted with a double chimney.
6229 was painted wartime black livery in November 1944. Its streamlined casing was removed for maintenance-efficiency reasons in December 1947 and it was then given the LMS 1946 black livery. In 1948, 6229 passed into BR ownership. BR renumbered the locomotive as 46229 in April 1948. It was painted in the short-lived BR blue livery in April 1950, but was soon repainted on 26 April 1952 into Brunswick green. The semi-streamlined smokebox was replaced with a round-topped smokebox in February 1957, and in September 1958 the locomotive was painted maroon. The lining was BR style to begin with; then in October 1959 it received the LMS style lining.
It was equipped with a speedometer in September 1957 and ATC in October 1959.
BR motive power depot allocations since 1948.
| Date Arrived | Depot |
| January 1948 | Crewe North |
| April 1948 | Camden |
| September 1949 | Crewe North |
| June 1952 | Camden |
| September 1960 | Crewe North |
| March 1961 | Edge Hill |
46229 was withdrawn from service at Edge Hill in February 1964 having completed 1,517,250 miles whilst in service.
46229 was saved from the scrap yard as a result of Sir Billy Butlin’s efforts to place these locomotives as children’s playground exhibits at his holiday camps.
Having started construction work in the winter of 1961, the new £2 million Butlins Minehead camp opened to the public on 26 May 1962. Duchess of Hamilton and LB&SCR A1 class Knowle were added in 1964, after being transported there by Pickfords.
Under a camp refurbishment and modernisation programme, the locomotives left the holiday camp in March 1975 via railhead access at Minehead railway station and the then closed West Somerset Railway. 46229 was towed by D1010 Western Campaigner from Taunton to Sindon. In 1976, the Friends of the National Railway Museum accepted the locomotive from Butlin’s on a twenty-year loan deal, and immediately began to restore and preserve it. It first ran as the Museum’s flagship locomotive in 1980 and was operational until 1985. After purchasing the locomotive from Butlin’s in 1987, after an extensive overhaul it resumed running in 1989, withdrawn from main line duty in 1996 when its seven-year boiler ticket expired.
From 1998 to 2005, 46229 was a static exhibit in the National Railway Museum, standing next to Mallard. In September 2005 the National Railway Museum announced that the streamlining would be re-instated, returning the locomotive to its original appearance. This work was undertaken at Tyseley Locomotive Works and in May 2009 it was returned to the National Railway Museum in its streamlined form.
| Home Base | Current Status | Owner |
| National Railway Museum – York | On static display | National Railway Museum NRM Object Number{1976-7000} |
Preserved British Steam Locomotives 