Class 701 Arterio

• Car lengths (driving cars 68 ft 3 in (20.8 m), intermediate cars 65 ft 3 in (19.90 m)) and width 9 ft 1 in (2.78 m): Southern Electric Group's page only; no builder or lessor figure has been found
• Car designations: ORR's operator codes from the 2020 authorisation letter, whose table is laid out awkwardly; the order agrees with the Southern Electric Group's (DMS-MS-TS-MS-MS-MS-MS-TS-MS-DMS and DMS-MS-TS-MS-DMS, the trailers third and eighth, and third), which gives no codes (set T6, 20 October 2026)
• The five-car 701/5s: the Southern Electric Group's August 2026 review notes 'more class 701/5 units return from storage'; how many are in service isn't known
• The driving car's second roof fairing's rear end, about 44 ft 3 in (13.5 m) from the nose: read on a three-quarter photograph (701045) to about 0.25 m; no square-on photograph of the car's rear half has been found (set T6, 20 October 2026)
• The drawing's intermediate cars: white with navy doors and a pale grey roof, the white stopping 70 mm above the yellow line, from two photographs (701011, May 2026; 701042, November 2025; layout and colour only); the light blue strip along each door's top isn't drawn
• The drawing's driving cars: the first door white, the second navy, and the bodyside behind a slanted edge just ahead of the second door white, from two three-quarter photographs (701011, May 2026; 701042, November 2025; layout and colour only, the edge placed to about 1 ft 4 in (0.4 m)); the navy dome and the pale roof behind it, and the yellow strip's turn back along the cab side, from one side-on photograph (701008, rectified on its first doorway; heights near the roof to about 30 mm, the band placed against the pale roof's foot; set AV fixes, Kyle's notes, 11 October 2026; the roof on the Class 720's 12 ft 0 in (3,653 mm) since set AVF5, where 701008 reads the bare roof about 3,640, its fairings about 3,720 and the cab dome about 3,705)
• The gaps between cars (2 ft 4 in (716 mm) between bodies) are the Class 720's, measured on Bombardier's drawing of that Aventra, not a 701 figure; with them the drawn train is longer than its cars' printed lengths add up to, by 2 ft 4 in (716 mm) a join
• The cab coupler's parts: the Class 710's heights and lengths (the same cab; the head's face 265 mm ahead of the nose, the Class 720's measured figure, since set C720K), checked for layout and colour on front views of 701013, 701030 and 701036, not re-measured on a 701
• The DM's underframe: indicative, from one square-on photograph of its front half (to about 10%) and one three-quarter view of its rear half; the other car types still draw the generic block
• Wheels 2 ft 8 in (825 mm) new: Wikipedia's Class 345 page, citing Bombardier's 2018 bogie portfolio presentation (not seen), taken for every FLEXX Eco Aventra
• The cab end (set AV): the Class 720's profile, cab door leaf and joints, measured on Bombardier's drawing of a 720; the 701's own cab side window and door window placed from one side-on photograph (701008, rectified on its first doorway, so good to about 10% far from it) and shaped from two close three-quarter ones (701033, 701045)
• The body's heights (AV9 and set AVF5): the Class 720's, from Bombardier's drawing, checked on one square-on photograph (701008, 7.33 mm a pixel, the rail placed from its wheels to about 10 mm), which agrees within about 20 mm; no 701 drawing or figure has been found
• 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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