- Class: 4MT
- Designer: Robert Riddles, with design work done at Brighton
- Wheels: 2-6-4T
- Built: 1957, Brighton Works
- Returned To Service: 27 July 2019
- Previously Operational: Oct 2001 to 19 May 2012
- Owned By: The 80151 Locomotive Company Limited (The Bluebell Railway Trust currently holds 40.3% of the shares in The 80151 Locomotive Company Limited)
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The 4MT tank locomotives were closely linked to the last years of the Bluebell line, and although the last Brighton-built locomotive, 80154, escaped preservation, the Bluebell now plays host to three other members of the class, all one-time residents of Barry scrapyard. 80151 arrived from another preservation site in 1998 and returned to steam after the completion of its overhaul in the Bluebell’s workshops in October 2001. Additional boiler work during early 2011 saw its operational period extended to May 2012.
Its latest overhaul, which cost over half a million pounds saw, along with routine heavy maintenance and boilerwork undertaken in-house, new tyres fitted to the driving wheels.
