The Stanier full brakes were built for use in passenger trains, parcels trains and in newspaper distribution. The first coaches to the earlier diagram were transitional in that they appeared in full livery and many were fitted with torpedo roof vents. The later diagram had shell vents, though some in the last batch were fitted with the ridged dome type used on the contemporary ‘Porthole’ stock. The last 189 of the D2007 coaches had no waist beading and those built in 1944 had second hand underframes. Some had their gangways removed in later BR days. Given these variations, photographs should be consulted if you are concerned to portray a particular example.
See M56AK for the welded bogie version of Diagram 2007.