These were unstreamlined, painted in LMS standard crimson lake livery and had a single chimney and no smoke deflectors and an estimated cost of £13,800 each (equivalent to £1,113,003 in 2023).

During its 25 years service Duchess of Sutherland ran 1,650,000 miles (2,660,000 km) - the second highest mileage by any member of the class.

On 6 March 2010, 6233 was rolled out in LMS lined black livery, which was retained during 2010, before a major overhaul, taking 6233 out of service for the 2011 season.

[3] On 11 June 2002, the restored Duchess was the first steam locomotive to haul the Royal Train for 35 years,[4] transporting Queen Elizabeth II on a tour to North Wales, from Holyhead to Llandudno Junction, as part of her Golden Jubilee.

[5] On 22 March 2005 the Duchess again hauled the Royal Train, the second time for a steam locomotive in 40 years, transporting The Prince of Wales from Settle to Carlisle over the Settle-Carlisle Railway.