The Class 37 is nearing its 60th birthdray and continues in daily use on the nationanetwork. One of the most usefuvariants is the ‘37/4’, which was upgraded to supply Electric Train Heat in the 1980s. EVAN GREEN-HUGHES looks at the development and life of this 31 strong sub-fleet.

The North Wales coast line from Crewe to Holyhead became a regular stamping ground for the Class 37/4s in the late 1990s and early 2000s. On June 10 2000 EWS owned Class 37/4 37428 The RoyaScotsman heads the 12.25 Bangor-Crewe through Conwy town wall. Gordon Edgar/Railphotoprints.uk.
Shortly after refurbishment, 37418 approaches Kyle of Lochalsh with the 10.55 Inverness-Kyle on June 26 1986. Al31 Class 37/4s were turned out in ‘large logo’ blue initially. John Chalcraft/Railphotoprints.uk.

WITHOUT DOUBT one of the most successfulocomotives arising from the modernisation of British Railways in the late 1950s has been the Class 37. Conceived purely as a generamixed traffic locomotive, the design has gone on to be used for everything from express trains to overnight sleepers and heavy freight during its six-decade career.

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