The following galleries are available:
Sorted by vehicle number
Sorted by set number
Unidentified vehicles
Parcel vehicles
On the Aberdeen - Inverness line
All

Date unknown
No details came with this slide, showing a two-car Swindon Cross-Country set, likely on the Central Wales Line. It is headlamp fitted, these began to appear in 1967. Stuart Mackay Collection.

26th January 1968
A Swindon Cross-Country DMU in Huntly station with an Inverness - Aberdeen service on 26 January 1968. Stuart Mackay Collection.

28th April 1973
This was taken from Class 120 set 510 on the Dean Forest RPS Llynfi and Ogmore railtour, on the Barry Island side of the tunnel to Barry Pier station, on 28 April 1973. The set in the siding should be a 116, it has a set number, 3x3 - maybe 323, but I cannot find any records of anything that matches. Stuart Mackay Collection.

May 1979
Class 120 DMBF SC51783 in Inverness depot in May 1979. Stuart Mackay Collection.

July 1961
A Swindon Cross-Country DMU with oval buffers is seen at Malvern Wells in July 1961. Stuart Mackay Collection.
Summary
Orders
Description
Modifications
Refurbishment
Diagrams & Design Codes
Works Photographs
Numbering & Driving Inst.
Liveries
Operations
Operations - Central Wales
Operations - LMR
Operations - Scotland 1958-81
Operations - Scotland 1986 on
Decline
Parcel Use
Images
Details about the preserved Class 120 vehicle can be found here.