Barker was one of England's most distinguished coachbuilders and dated back to 1710, when an officer of the Royal Guard founded a coachbuilding company in London. Barker had entered the automobile era as Barker & Co. Ltd. in 1900. Through the centuries, the company went on to curry the favour and patronage of the Royal household. This high level of visibility helped Barker become well known in the Arab world and the Far East.
With such distinguished history, it's no wonder Barker came to express its company's artfulness on Rolls-Royce chassis. In 1905, C.S. Rolls took a liking to their work and announced that "all his cars would be fitted with Barker bodywork". Thus Barker became (one of the) more-or-less "official" coachbuilders, although customers could send their chassis to any of the many other coachbuilders around if they wished.
In 1938 Barker went into receivership and was taken over by rival coachbuilder Hooper.