The VHF service from Black Mountain closes.

The service area for UHF however was designed to cover more of inland mid Wales than the VHF service had been.

Other areas of the country would be designated as "UHF islands", since they were too close to larger cities for VHF service.

Both the UHF and VHF services continued in tandem until 1985, when VHF television was discontinued in the UK.

The Springfield market was designated as an all-UHF market because it was too close to Boston, Hartford and the Capital District for VHF service.

It is home to one of RTÉ's original five main television transmitters, coming on air in 1963 with a 625-line VHF service.

However, St Hilary was never used as part of the replacement UHF network and TV transmission from it ceased when VHF services were switched off in 1985.

TV transmissions ceased from this site with the demise of the original VHF service in 1985.

From 1969, the two VHF services also started to use this network, which took many years to complete.

St Hilary was never used as part of the UHF network and TV transmission from it ceased when the VHF services were closed down many years later in 1985.