The BBC set up the first television transmitter in Northern Ireland at Glencairn, a GPO receiving station just down the hill, on the Belfast side, from Divis Mountain.  This temporary mobile transmitter was one of a number set up in the UK in 1953 to give coverage of the coronation broadcast, in advance of permanent transmitters being built.  In 1954 the BBC made and broadcast a television programme about this transmitting station and the initial building of its permanent replacement site at Divis. 

The UHF antenna and cylinder replacement involved using a temporary UHF antenna.  As this resulted in reduced coverage for a few weeks, the NI region put out announcements and a ‘trailer’ warning of the event and explaining the necessity of the work. These raw unedited shots were made as part of the publicity (only a few seconds were actually broadcast).  The video was put together by Peter Melly an ex-transmitter engineer who transferred to Belfast studios.