These were built by C.C.Crump Ltd of Connahs Quay in 1988, reusing redundant liquid chlorine and caustic soda railtank chassis. Owned by Tiger Rail Leasing, they were mostly used for stone traffic. Bachmann have recently released this version (37-552B), wrongly described in the catalogue as a PNA. It is in ARC yellow livery and numbered TRL 5322.