Only one RU was fitted with a luxury-coach body however, this was ordered by Accrington and delivered to Hyndburn as its 38 (STC986M). This carried one of the three East Lancashire 'Lancastrian' coach bodies built, the only one to 10-metre length. It was an ungainly vehicle with a high ramped floor, carrying 39 Plaxton seats, all forward-facing, Large curved side screens were used on the four main-bays, of a type used on contemporary Mercedes-Benz and Neoplan coaches leading to a parabolic roof contour, but aft of the rear axle flat Willowbrook-pattern bus glazing was used, offside and nearside emergency doors were fitted. A wide two-leaf entry/exit door was fitted forward of the front axle to ensure grant-compliance, and the front was basically flat with a very large angled flat-glass windscreen surmounted by a peak reminiscent of a British Rail 'Western' diesel-hydraulic locomotive. Luggage was contained in underfloor wheelbase lockers as in contemporary Bristol RE coaches. It spent a quiet life, working peak hour extras and select coach hires. It seems an irony that two early Harrington Cavaliers were exclusively to transport the blind yet this coach, finished in navy blue with scarlet flashes, was able to assault the senses of the sighted for one of the longer operational lives of its type, actually outlasting the two similar bodies Widnes/Halton had on Leopards. Hyndburn 38 may have been an aesthetic disaster, but it was not: unlike most RU, a mechanical one (see later).
