that of a time signal, was added. In 1977 this took the form of the rolling slow code in use until April 2007, when BT's contract to transmit the time signal also passed to VT Communications, using their Anthorn radio station in Cumbria. The aerial system at the VLF transmitter existed between 1926 and 2004 and consisted of twelve 250 metre (820 ft) high, guyed steel-framework masts insulated against ground and carrying an aerial wire. This wire was mainly destroyed by heavy iceloads in the winter of 1940. After the shutdown of GBR, the facility was only used for transmitting the MSF time signal. Therefore, eight of the twelve masts were obsolete and demolished on the night of 19 June 2004 to 20 June 2004. A trial transmission of the LORAN-C navigation system was run at the station from June 2005 until March 2007. The remaining four 'tall' masts were demolished on 2 August 2007. The site is now being developed into a large new housing estate named Houlton, the first homes of which were occupied in December 2017. The power and transmission buildings, as well as a water tower have been reused as part of Houlton School. See also List of masts List of tallest buildings and structures in Great Britain List of radio stations in the United Kingdom Notes External links A History of Rugby Radio National Physical Laboratory – news of the MSF Move Film archives (video, 1:43 minutes) (video, 3:02 minutes) - 1932 British Pathe film about the station. - short film recording the work of the riggers who worked at the station British military radio British Telecom buildings and structures Buildings and structures in Rugby, Warwickshire Transmitter sites in England Time signal radio stations Former radio masts and towers 2007 disestablishments in England LORAN-C transmitters Grade II listed buildings in Warwickshire 1926 establishments in England