in October 1973, the site for their medium wave transmitters was not complete. As a result, a temporary 'Tee' antenna was strung up between the two chimneys (transmitting LBC on 417 m (719 kHz), and Capital Radio on 539 m (557 kHz)), until the permanent site at Saffron Green was ready in 1975. Some years later the site was used again, on 720 kHz (for a low power MW relay of BBC Radio 4's LW service) which was in use until 2001 when the radio transmitter was moved to Crystal Palace. In July 1992, it was decided not to re-equip Lots Road again; rather it was to continue to operate only until the machinery's life was expired. It was finally shut down on 21 October 2002, and since then all power for the Tube system has been supplied from the National Grid. Redevelopment The property company that bought the site wished to convert the station into shops, restaurants and apartments, and to construct additional buildings, including two skyscrapers, on the adjoining vacant land. The scheme was delayed because Kensington & Chelsea Council refused planning permission for one of the two towers. The other, South Tower, the taller, was granted permission by Hammersmith & Fulham Council, but the developer was unwilling to proceed without permission for both. On 30 January 2006 the Secretary of State, considering especially views of the Planning Inspector, granted planning permission for the development. In 2007 the developer hoped to complete the scheme by 2013, but it was delayed by the economic downturn. On 13 September 2010, Thames Water announced that they would be building the Thames Tideway super sewer. One of the preferred accesses, Cremorne Wharf Foreshore, adjoins but which will end a nearby combined sewer overflow. The consultation period ended in Autumn 2010. On 26 September 2013, developer Hutchison Whampoa Properties broke ground on the eight-acre site, rebranding it as "Chelsea Waterfront", with Mayor of London Boris Johnson speaking at the ceremony: "The £1 billion scheme will be the biggest riverside development on the north bank [of the Thames] for over 100 years, and will create 706 homes." New planning and design details were conceived between 2010 and 2012, with construction for the first phase (100 apartments) completed by 2016, and phase two, which included the power station itself, completed by 2018. See also Power House, Chiswick – its generating capacity was subsumed by Lots