4270 was completed at Swindon in 1919. It still retains inside steam pipes and is thus rather closer to original condition.
BR motive power depot allocations since 1948.
| Date Arrived | Depot |
| January 1948 | Ebbw Junction |
| January 1948 | Aberbeeg |
| October 1949 | Cardiff Canton |
It was withdrawn in 1962, making the short journey from its last shed at Cardiff to the Barry scrapyard. It left the Barry yard in July 1985.
Restoration started at Toddington in 2003 before it moved elsewhere until it returned in 2013. It was restored to steam in 2014.
| Home Base | Current Status | Owner |
| Gloucestershire Warwickshire Railway | Operational | Jeremy Hosking |
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4270 at Toddington on the Gloucestershire Warwickshire Railway-2015 |
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4270 at Bewdley on the Severn Valley Railway-2015 |
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4270 crossing the Victoria Gridge over the River Severn on the Severn Valley Railway-2015 |
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4270 at Bewdley on the Severn Valley Railway-2015 |
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4270 at Bewdley on the Severn Valley Railway-2016 |
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4270 at Highley on the Severn Valley Railway-2016 |
