The Membury transmitting station is a broadcasting and telecommunications facility, situated adjacent to the M4 motorway at the Membury services in the south-west corner of the parish of Lambourn close to the town of Hungerford, in Berkshire. It is owned and operated by Arqiva.
It has a 152.4 m high guyed steel lattice mast. It was constructed by the ITA in 1965 to bring ITV signals to the "South Midlands", including Oxford, Swindon, Newbury and Marlborough on 405-line VHF, using Channel 12.
It was not used for any broadcast services for a decade after the closure of 405 line television in 1985.
Wikipedia https://en.wikipedia.org/wiki/Membury_transmitting_station
Coordinates 51°29'5.693" N -1°33'31.83" E