46115 Scots Guardsman was built as 6115 by the North British Locomotive Company of Glasgow in 1927.
It was named Scots Guardsman in 1928 after the Scots Guards. After receiving smoke deflectors, it starred in the 1936 film Night Mail. It was in fact the first member of the class to be equipped with the distinctive curved smoke deflectors.
6115 was rebuilt in 1947 with a new tapered type 2A boiler, and was painted in LMS 1946-style black livery. It was the first of the rebuilt engines to receive smoke deflectors and the only one to run with them as an LMS engine. It was renumbered 46115 by British Railways in 1948 and was the last of the class in service from service at Carlisle Kingmoor depot in December 1965.
BR motive power depot allocations since 1948.
| Date Arrived | Depot |
| January 1948 | Crewe North |
| March 1949 | Carlisle Upperby |
| September 1949 | Longsight |
| September 1960 | Crewe North |
| May 1961 | Carlisle Upperby |
| May 1964 | Springs Branch Wigan |
| July 1964 | Carlisle Upperby |
| November 1964 | Carlisle Kingmoor |
It bought the late Bob Bill and moved to Haworth on the Keighley Worth Valley Railway but subsequently it was decided that the locomotive was too large for the requirements of the line at that time.
In May 1969, 46115 Scots Guardsman was hauled to Dinting Railway Centre which was then the home of the Bahamas Locomotive Society who kept Jubilee 45596 Bahamas there until it closed in 1991.
It was restored at Dinting by 1978 and ran only two mainline railtours later that year before it required major boiler repairs.
Peter Bill, son of Bob, sold the Scots Guardsman to the 46115 Scots Guardsman Trust, which delivered it to the Birmingham Railway Museum in Tylesely in 1989 for overhaul – however, it was neglected as other work was deemed higher priority.
46115 was purchased by David Smith, who owns the West Coast Railway Company, and in 2008, it was restored to main-line running standard. Its first test run from Carnforth to Hellifield was completed on in June 2008. The locomotive was then moved back into the depot at Steamtown and repainted BR Brunswick Green, appearing in this livery at the Steamtown Open Weekend in July 2008. It then hauled its first railtour called ‘The Settle-Carlisle Venturer’ from Hellifield to Carlisle and return in August 2008.
The locomotive carried the Olympic torch in 2012 in place of Flying Scotsman.
46115 was withdrawn from service in August 2017.
In 2018 a new inside cylinder was cast for the locomotive.
46115 remains main line certified and is normally based at Carnforth.
The locomotive returned to the main line at the end of July 2019 when it underwent a light test run. The loaded test run a few days later was cancelled but it did complete a loaded test run in August 2019 before working from Hellafield to Carlisle as pilot to Merchant Navy 35018 British India Line the following month.
| Home Base | Current Status | Owner |
| West Coast Railway Company – Carnforth | Operational | West Coast Railways Co |
Preserved British Steam Locomotives 