Whereas a further 40 kitchen/dining Firsts were built to the same 'low-window' style from 1929 onwards, accompanying Third Class dining was felt to be better served by the new 'high-window' Open Third Saloons and as a consequence, from 1930, the six Third Class Restaurant Dining Saloons were reclassified as Open Thirds. In 1947 the six coaches received updated interiors, with four of the coaches becoming composite coaches and two becoming First Class Coaches. The four composite coaches, nos. 1365-1368, served on the South Western section of the railway network paired with diagram 2659 Kitchen & Buffet Cars.