10 In March 2013, Crossrail Ltd awarded the contract to design, test and commission key communications and control systems in Crossrail's central section to Siemens plc. The contractor was dependent on station construction contractors for installation in all but two stations. The communications and control systems being provided under this contract include CCTV and public address systems at stations, customer information displays, staff and emergency services radio systems and data networks to transfer information to and from the Elizabeth line control centre. At the time the contract was awarded, Crossrail Ltd was aiming for the contract to cost around £43 million.