Rolls-Royce Limited was formed on 15 March 1906, by which time it was apparent that new premises were required for production of cars. After considering sites in Manchester, Coventry, Bradford and Leicester, it was an offer from Derby's council of cheap electricity that resulted in the decision to acquire a site on the southern edge of that city. The new factory was largely designed by Royce, and production began in early 1908, with a formal opening on 9 July 1908 by Sir John Montagu. The investment in the new company required further capital to be raised, and on 6 December 1906 £100,000 of new shares were offered to the public. In 1907, Rolls-Royce bought out C.S. Rolls & Co. (The non-motor car interests of Royce Ltd. continued to operate separately).