These images were taken on three different occasions in 1959.
59/459 - exterior, 51594 and 59620, presumably with 59590 and 51593.
59/460 - as above.
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59/572 - Interior of Driving Compartment - Lot 30521
59/573 - Interior of Driving Compartment - Lot 30521)
59/574 - Interior of Second Class Compartment - Lot 30521
59/575 - Interior of Second Class Compartment - Lot 30521
59/576 - Interior of Lavatory Vestibule - Lot 30522
59/577 - Interior of Second Class Compartment - Lot 30522
59/578 - Interior of Second Class Compartment - Lot 30522
59/579 - Interior of Brake Compartment - Lot 30521
59/580 - Interior of Brake Compartment - Lot 30521
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59/746 - Exterior of 51615
Negative 59/459
Nearest is 51594 and 59620, presumably with 59590 and 51593. Edwin Marks has identified the location as Rudyard Lake on the Churnet Valley Line (see this image). Circa July 1959
These images were taken as publicity images for British Railways at Cricklewood Carriage Sidings by the commercial photographer Sam Lambert, probably in May 1959 when the first set was delivered.
Summary
Background
Description
Power Train
Interiors
Works Photos
Diagrams & Design Codes
Driving Instructions
Numbering
Liveries
Operations
Accidents
Parcel Use
Images
Details about preserved Class 127s can be found here.
Also relavant is the article "Working the DMUs" by Cricklewood Driver Arno Brooks.