It was under Thatcher's successor John Major that the railways themselves were privatised, using the Railways Act 1993. The operations of the BRB were broken up and sold off, with various regulatory functions transferred to the newly created office of the Rail Regulator. Ownership of the infrastructure including the larger stations passed to Railtrack, while track maintenance and renewal assets were sold to 13 companies across the network. Ownership of passenger trains passed to three rolling stock companies (ROSCOs) – the stock being leased out to passenger train operating companies (TOCs) awarded contracts through a new system of rail franchising overseen by the Office of Passenger Rail Franchising (OPRAF). Ownership and operation of rail freight in Great Britain passed to two companies – English Welsh & Scottish (EWS) and Freightliner, less than the originally intended six, although there are considerably more now.