Class 800

• How many diesel generator units each train carries (inferred: one per motor car)
• Driving-car length: 83 ft 10 in (25.56 m) nose to body end on LNER's livery drawings, 83 ft 2 in (25.35 m) in Hitachi's 2014 paper
• Heights: measured above the bottoms of the drawn wheels, which are drawn 3 ft 6 in (1.06 m) across; no source gives the real wheel size
• The pantographs: placed from photographs (scaled by the driving car's doors and windows, to about 0.3 m); no drawing of this class's roof has been published; drawn with no roof well, as photographs show the roof line level over it from the side (set C800F, 13 October 2026), the folded pantograph standing about 240 mm above the roof edge, read off a close platform photograph of 811011 at Paddington scaled by its door: a lower bound, the camera being below the roof; a level, long-lens photograph would measure it
• The cab front: laid on ADPL's sheet 1 outline (side B), within 6 mm; compared with 802304 at Welton (three-quarter) for its shape only
• The driving cars' cab-end bogie: placed at 14 ft 7 in (4,455 mm) from the nose from three side-on photographs (801226, 800017, 801107; they agree within about 50 mm), not from a dimensioned drawing; the wheelbase is drawn 2,600, Beacon's figure for the 803 (set C800B3)
• The bogies: the wheelbase is drawn 8 ft 6 in (2,600 mm), Beacon's figure for the 803 (the photographs read 2,574-2,670); the driving cars' inner bogie centre is drawn at 70 ft 4 in (21,450 mm) from the nose, against about 21,510 (±30) on two long-lens photographs of 802111 and about 21,590 on Beacon's diagram fitted to the doors: not settled, so left as drawn
• The underframes (set UFAT300): from photographs only, no drawing of the AT300's underframe having been published; positions to about 150 mm on the level photographs and 1 ft 0 in to 2 ft 0 in (300-600 mm) on the three-quarter ones; intermediate cars without a side-on photograph of their own drawn with plain panels, or the 805's generator-unit group, as the record's underframe_checked says
• The inner gangway (set JN807): from photographs of 802 and 800 joins, and the 807's seen three-quarter; no drawing of the gangway has been published. The bellows' top is drawn 11 ft 1 in (3,390 mm; the photographs read 3,358 and 3,425), their foot 1,220 (839111; 800020, closer, reads about 1,330); the cables' loops and the brackets are placed from the photographs to about 100 mm
• The car height: 12 ft 3 in (3.725 m) is the body's roof edge as LNER's livery drawings give it; no printed height has been found, and the grey roof covers stand about 0.27 m above it (801226, 2022)
• The diesel generator units' output: 700 kW each is not confirmed for the Class 800. Hitachi Review 2014 prints no rating (pp. 646-650), and the International Railway Journal gives 560 kW for the 800's engines against 700 kW for the 802's
• GWR green: colours: sampled from photographs of GWR's 802s, which share the 800s' livery; GWR publishes no paint references
• 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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