M15319 is a side corridor 'composite' coach with three second-class and four first-class compartments either side of a cross corridor. This coach was moved from Cricklewood to Aylesbury during 1976. It arrived at Quainton with other stock by a track slew of the BR line in July 1977, for details of stock arriving in this delivery see the Visitors section. It was scrapped during February 2008.