[4][5] (John Logie Baird's earlier transmitter and TV studios were a separate development at the other end of the Palace and perished with it in 1936.

This tower was designed and built for BBC by British Insulated Callender's Construction Co. Ltd., with steelwork fabrication by Painter Brothers Ltd. of Hereford.

When UHF transmissions started in 1964, first the new BBC2 and later both BBC 1 and ITV (Rediffusion weekdays and ATV London at weekends) were transmitted from Crystal Palace.

With digital switchover completed all services come from Crystal Palace again, but because of the site's importance Croydon will be able to duplicate the PSB multiplexes in case of emergency.

Crystal Palace remained a key part of the network after analogue was switched off in the London area in April 2012.

In July 2007 it was confirmed by Ofcom that Crystal Palace would remain an A group transmitter after DSO (digital switchover).

Between opening in 1974 and January 1982, the main transmitter at Bluebell Hill broadcast ITV London signals to much of north and central Kent.

[citation needed] As one would expect for the largest transmitter in the country – by population coverage – Crystal Palace transmitter remained an A group, (which was its original analogue group) both during dual running (analogue and low-power pre-DSO digital) and full-power digital after DSO.

On 18 April 2012, a public lighting display was performed from the tower to mark the last day of analogue TV broadcasts from the transmitter.

[22] There are also low-power relays situated across Greater London and also in parts of Kent, West Sussex, Surrey, Oxfordshire, Buckinghamshire and Hertfordshire.