37405 heads up the Rhymney Valley at Ystrad Mynach on 10 December 2005 with the 2R22 11:59 Cardiff Central to Rhymney Arriva Trains Wales service. In the background is the Grade II listed Hengoed Viaduct. This 1853 built 16 arch viaduct was closed to rail traffic in 1964, but now serves as part of the national cycle network.