Vincent Black Knight from the saddle and a single damper replaced the twin rear shocks. The frame was also modified with the strong steel 'backbone' was replaced with a single tubular strut bolted to the steering head (which proved much weaker). The Black Knight was launched at the 1954 Earls Court motorcycle show, together with the 998cc Vincent Black Prince (an enclosed version of the Black Shadow ) and the 500cc Vincent Victor (which never went into production as only the prototype was ever built). There was a lot of interest but much of it was critical, and the Black Knight/Black Prince models
Black Prince Buses of routes centred on Morley in competition with Yorkshire Rider. A variety of second-hand vehicles were acquired to operate the routes, and a livery of red and yellow introduced. By 2004, Black Prince operated a fleet of 40 vehicles on a network of routes around Leeds, with an annual turnover of almost £3 million. Many of its routes competed with Yorkshire Rider's successor First Leeds. In May 2005, FirstGroup announced its intention to purchase Black Prince. Although this move reduced competition in Leeds, it was approved by the Office of Fair Trading as Black Prince had intended to close if