However, the introduction of fibre optic network technology rendered these microwave towers largely obsolete for their original purpose.
They are at: The other seven are: Below the level of the major telecommunications towers, mobile phone operators run roughly 23,000 base stations.
[3] Since the discontinuation of the Ofcom sitefinder website in 2015, Estate Systems Ltd have developed a comprehensive site www.mastdata.com[4] for use by the public and mobile operators (subject to a fee) which locates masts within the UK including Northern Ireland.
The first UK microwave relay towers were built in about 1952 for a television link between Manchester and Kirk o'Shotts near Glasgow.
It announced "The Post Office are planning to build up a special network, both by cable and radio, designed to maintain long distance communication in the event of an attack".