one of the railway's distinctive locomotives were built by Beyer, Peacock and Company of Manchester between 1873 and 1926, with 16 steam locomotives in total. As of January 2021 there are nominally two locomotives in traffic: No. 13 Kissack and No. 15 Caledonia. In addition, No. 11 Maitland is undergoing a long-term rebuild, whilst No. 4 Loch and No. 10 G. H. Wood are both undergoing overhaul. The Isle of Man Railway Museum is home to No. 1 Sutherland of 1873 and No. 6 Peveril of 1875, with other locomotives at various locations. Only No. 2 Derby has been lost, with only the frames of No. 7 Tynwald in existence, privately owned off-island. The railway also possesses two diesel locomotives: No. 17 Viking which was withdrawn in 2010 and the unnamed No. 21, a diesel electric locomotive delivered in December 2013. A number of smaller shunting locomotives and people carriers for departmental use also exist including two Motor-Rail units numbered 24 and 25 based at Port Erin and two Wickham people carriers numbered 22 and 23 used on departmental work and fire train duties. As at 2022 there are four operational steam locomotives with a further three undergoing overhaul both on and off the railway. Carriages About 30 carriages remain on the railway, of which 18 are in service, two in the Isle of Man Railway Museum, and the rest in storage. Several vehicles were sold off-island in 1975 for preservation, and at least one has been preserved privately on the island. Over 12 out-of-use carriages were lost in a fire that engulfed the large carriage shed at St John's in 1975, and more were damaged beyond economic repair, including most of the remaining Manx Northern six-wheelers. There is an ongoing maintenance programme for returning carriages to traffic, which saw two saloons completely rebuilt and returned to traffic in 2011, with a further two in 2012, all of which now form part of the dining train. In the winter of 2013, a replica of Empress Van F.27 was built on a steel underframe as a kitchen to work with the saloons as a dining train. Significant work was also done on the Cardinal's Coach F.35, which is used as the bar carriage, and the other saloons have being converted recently to dining cars seating 66 in total, giving the six saloon set as of 2015. Further restored stock include 'pairs'