Class 323

• Northern's 34: its original 17 (323223-239) and 17 of West Midlands Railway's 26; the tender lists only 16 unit numbers for the 17. Northern was looking to lease two more (April 2025). What became of the other ex-West Midlands units isn't known
• Build years: Porterbrook's dates run from November 1992 to January 1996; Wikipedia gives 1992-1995
• Car lengths are Porterbrook's (76 ft 11 in (23.44 m) and 76 ft 8 in (23.37 m)), probably over couplers; Wikipedia gives 74 ft 10 in (22.81 m) and 74 ft 11 in (22.84 m) over the body. Height: 12 ft 3 in (3.73 m; Porterbrook) or 12 ft 4 in (3.769 m; Wikipedia)
• Seat count after Northern's refresh is not published
• Ownership: the 2013 brochure lists 22 London Midland, 4 Centro (managed by Porterbrook) and 17 Northern units; current ownership of the four Centro units isn't confirmed
• Drawing: no dimensioned elevation found. Door centres from Porterbrook's seating plan and the Commons side diagram differ by up to 1 ft 8 in (0.5 m) and are drawn at their average; the windows' places along the cars are the diagram's, and the 2002 photographs put several bays 8 in to 1 ft 4 in (0.2-0.4 m) further from the cab (set C323R). The nose's rake isn't checkable: no photograph abeam the closed nose has been found
• Drawing: bogie centres 52 ft 6 in (16.000 m) are Wikipedia's (Webber 1999), and the 2002 photographs give 52 ft 6 in to 53 ft 6 in (16.0-16.3 m; the Commons side diagram's 50 ft 6 in to 51 ft 2 in (15.4-15.6 m) is wrong); the cab bogie about 10 ft 10 in (3.30 m) from the nose on 65014 (drawn 3.405)
• Drawing: the pantograph well (19 ft 0 in (5.8 m) long, floor 11 ft 4 in (3,450 mm)) is measured on two oblique photographs by perspective fits, to about 0.2 m along and 50 mm in height; both photographs also put the roof's crown about 100 mm higher above the door tops than drawn, which isn't changed
• Drawing: the roof's crown is drawn at 12 ft 6 in (3.81 m), read on the 2002 photographs at 12 ft 6 in to 12 ft 7 in (3.80-3.83 m; medium confidence: the camera stood below the roof), where Porterbrook gives the car's height as 12 ft 3 in (3.73 m)
• West Midlands Railway: how many of Northern's 34 still carry it after the 2025-26 refresh at Manchester International isn't known
• West Midlands Railway: the lattice 'W' (WMR rhombuses (10 October 2026)): read on one three-quarter photograph (323222, full size) rectified on its windows and first door, and checked on 323208: the gold ends about 14 ft 1 in (4.3 m) from the front, the rhombuses (the 730's figures, from 13 ft 3 in (4.04 m)) stop about 16 ft 9 in (5.1 m), white from there to the first door; about 100 mm
• The years of the former liveries come from Wikipedia's class article and the other sources listed, and haven't been checked against a second source.

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