28th July, 2025
New-build diesel-electric LMS 10000 exhibits at the Greatest Gathering
Artwork by Mark Langley
The Ivatt Diesel Recreation Society (IDRS) has released details of the LMS 10000’s appearance at the ‘Greatest Gathering’.
Background
Two engines, known as the LMS Twins, numbers 10000 and 10001, were pioneer British mainline diesel locomotives.
They were designed and built by H G Ivatt, the last Chief Mechanical Engineer of the London, Midland and Scottish (LMS), working closely with English Electric.
In December 1947, no. 10000 rolled out of Derby works.
The LMS Twins were locomotives of the steam age, and were serviced alongside Stanier’s Pacifics and Black Fives.
They were vacuum-braked, two-person-crewed, and water-scoop fitted.
The two locomotives show that diesel electric power was a viable match for steam power.
They worked together on Euston-Glasgow ‘Royal Scot’ expresses, and worked individually on Class 5 mixed traffic.
Their English electric prime mover was the 16SVT 16-cylinder ‘V’ four-stroke diesel.
It proved so successful that its derivatives powered later diesel electric classes, including 08, 20, 31, 37, 40 and 50.
The LMS Twins operated before the first of the BR Standard steam locos, and were still running in 1961, which was after the final build of 999 new steam locomotives.
The Twins were withdrawn and scrapped in the 1960s.
By then, they had served for almost forty years.
The Ivatt Diesel Recreation Society is building the third locomotive of this design.
It has obtained an English Electric 16SVT power unit.
Now being kept in warm storage, the power unit was part of the 1947 batch.
It is in great condition with low running hours.
The bogies are ex-EM2 (class 77).
This is the same design, but will need stronger suspension to allow for the new diesel’s greater weight.
The chassis is from a class 58.
It has been stripped and is ready to be plasma-cut to shape and then fitted to the bogies.
An adapter plate will be used to carry out this work.
It has been designed and a wooden mockup created, which will be on display at the Greatest Gathering.