Croydon Transmitter
The Croydon transmitting station (also known as the NTL Tower) is a broadcasting and telecommunications facility located in Upper Norwood, London, England ( grid reference TQ332696), in the London Borough of Croydon, owned by Arqiva. It was founded in 1955 and initially used a small lattice tower. The tower present on the site today is 152 metres (499 ft) high and was built in 1962. The Croydon Transmitter was originally used to broadcast the London ITV signal on VHF Band III. When UHF broadcasting began the nearby Crystal Palace Transmitter was used. VHF television was discontinued in 1985, and the Croydon Transmitter was not used again for regular TV broadcasting until 1997, when a new directional UHF antenna, designed to avoid interference with continental transmitters, was installed to carry the newly-launched Five in the London area. It still carries Five's analogue signal, although its digital terrestrial service uses Crystal Palace. Croydon also has reserve transmitters for BBC1, BBC2, ITV1 and Channel 4, but these are only used in the event of engineering works or a failure at Crystal Palace. The site is also a maintenance base for transmitter teams and previously used to house one of four Regional Operations Centres or ROCs.

Channels listed by Frequency
Analogue Radio ( FM VHF)
  • 94.9 MHz - BBC Radio London (backup for Crystal Palace)
  • 95.8 MHz - Capital (4KW)
  • 97.3 MHz - LBC (4KW)
  • 100.0 MHz - Kiss 100 (4KW)
  • 102.2 MHz - Smooth FM (4KW)
  • 105.4 MHz - Magic (4KW)
  • 106.2 MHz - Heart (4KW)
Digital Radio ( DAB)
  • Block 11B - 218.640 MHz - DRg London (2.5KW)
  • Block 12C - 227.360 MHz - CE London (5KW)
Analogue Television
  • UHF 23 (487.25 MHz) - ITV1 London (backup for Crystal Palace)
  • UHF 26 (511.25 MHz) - BBC One London (backup for Crystal Palace)
  • UHF 30 (543.25 MHz) - Channel 4 (backup for Crystal Palace)
  • UHF 33 (567.25 MHz) - BBC Two (backup for Crystal Palace)
  • UHF 37 (599.25 MHz) - Five (1000KW)