Bazalgette. The sister vessel Duncan was introduced on 20 April. By the end of the 1920s, the rise in motor traffic had put pressure on the ferry's capacity. A proposed bridge between Shooter's Hill and East Ham was rejected as too obvious a target for wartime bombings, and a third vessel was introduced instead. Because of the lack of a fixed crossing, the Thames became a psychological barrier for those living in the East End of London, who could only use a limited number of routes to cross the river, including the Woolwich Ferry. The lack of a suitable alternative route was instrumental in creating plans for what eventually became the Dartford Crossing further downstream. By the 1950s it was still quicker for ferry traffic to divert via the Blackwall Tunnel even with all three vessels operating at full capacity. In April 1963, the paddle steamers were replaced and the ferry service upgraded to a roll-on/roll-off model, reducing waiting times on the approach roads. The LCC continued to operate the ferry until it was replaced by the Greater London Council (GLC) on 31 March 1965. In 1964, Marples Ridgway started building the current reinforced concrete terminals, which can operate over a tidal range. The current terminals were opened in 1966. After the abolition of the GLC in 1986, the responsibility for operating the service was transferred to the Secretary of State for Transport, who contracted the then London Borough of Greenwich to run the service. Asset ownership and operating rights were subsequently transferred to Transport for London (TfL) on the establishment of the Greater London Authority, but the London Borough of Greenwich continued to operate the ferry on behalf of TfL. In March 2008, the London Borough of Greenwich gave TfL notice that it would cease operating the service from 30 September 2008. On 12 September TfL announced that the outsourcing group Serco would take over the operation of the service from 1 October 2008; the contract ran initially until 31 March 2010. Control of the crossing passed from Serco to Briggs Marine, which was expanding into public passenger services, in December 2012. The company was awarded a £50 million seven-year contract, which began in April 2013. In 2014, TfL began an upgrade of the ferry service, starting by refurbishing the piers and in 2016 ordering two new boats to replace the existing vessels that were nearing the end of