Between 1974 - 1980 BR introduced a heavily constructed 50ft. long steel carrier, the BBA. 550 were built. some were equipped with cradles for coils and later some were equipped with telescopic covers as BXA or BWA. All in this collection are in use for coils - some as conversions but others in their original flat deck form.
All my BBA photos are here https://paulbartlett.zenfolio.com/bba
© Paul Bartlett's Photographs