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"Lab 19 Iris II" might sound like a specialist wing of the Porton Down Experimental Establishment but this was in fact the name of a DMU converted in 1991 from a power twin Metropolitan-Cammell class 101 unit (units 53222-53338). Rebuilt by the Research & Development Division of British Rail at Derby as a test train, it was initially used for radio survey work particularly with the National Radio Network (NRN) and later for video survey work including extensive signal sighting on the WCML prior to the introduction of 125 mph. Bearing the BR Research's silver and grey livery, it is seen passing through London Bridge station on 23 March 1993. Withdrawn and stored at Derby's Railway Technical Centre, it was sold by Network Rail to a private buyer in early 2008. After a short spell at Dunster station on the West Somerset Railway, it was moved to the Barry Tourist railway.


London Bridge
23rd March 1993
Gordon Edgar


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