These were probably taken circa March 1960 when the first set was complete.
Negative B15/143
TCL. This is taken in the first class saloon, looking through the toilet area to second class.
Negative B15/144
TCL. This is taken in the first class section in the smoking saloon and looking through the door to non-smoking.
Negative B15/146
TCL. This is taken in the second class section, the vehicle diagrams shows that through the door there should be a non-smoking section yet there is no smoking signs on the windows or door.
Negative B15/148
Probably the DMS, looking towards the cab. Immediately behind the drivers bulkhead there is an oval mirror on each side wall.
The following is a list of official British Railways Swindon Works photographs. The National Railway Museum now holds this collection, and prints may be ordered from them.
Centre car W59472 was photographed at the Works on March 12th 1964 after sustaining collision damage from an unknown incident. It would be repaired and returned to traffic.
Summary
Description
Diagrams
Refurbishment
Works Photographs
Numbering & Driving Inst.
Liveries
Operations
Non-Passenger Use
Images
Details about the preserved Class 118 vehicle can be found here.