The Hetton Colliery locomotive "Lyon" ... the actual age & designer have been subjects of study & debate for some time ...
HOWEVER, investigations in 2020 strongly indicate that she was built c1849 ... see here for more information www.railwaymuseum.org.uk/about-us/press-office/myth-hetton-engine-solved

Wikipedia needs to be updated ! Claimed to have been built by the colliery in 1851/2 to a design by Young, extensively rebuilt in 1882 and continued to work until approx 1910 [1908 - 1812, sources differ]. This could be a replica of an earlier design built in 1852 by Wood.
full item ... en.wikipedia.org/wiki/Lyon,_Hetton_colliery_railway