The Bilsdale transmitting station is a broadcasting and telecommunications facility, located at Bilsdale West Moor above Bilsdale, close to Helmsley, North Yorkshire, England. The original facility included a guyed steel tubular mast that was primarily used for radio and television transmission. The height of the mast was to the pinnacle. Until a fire disabled the transmitter on 10 August 2021 it was among the most powerful transmitters in the UK. The power for analogue was 500 kW ERP and it was 100 kW / 50 kW for digital. The mast was equipped with aircraft warning lights, in the form of arrays of red LEDs. The station was owned and operated by Arqiva. The transmitting station now has a temporary mast located close to the original mast. It commenced operations on 13 October 2021. History Original mast (1969–2021) Bilsdale was constructed by J. L. Eve Construction for the BBC in 1969 to bring 625-line colour television on UHF to Teesside and the surrounding areas for the first time. Having added UHF TV to the existing VHF TV stations at Pontop Pike and Emley Moor, it was quickly established that a new station would be required to cover County Durham and north North Yorkshire where existing coverage was poor, and thus the new station was built. Fire and demolition On 10 August 2021, a fire started at the complex which included the mast. At 13:19 an engineer working at the transmitter called the North Yorkshire Fire and Rescue Service stating that he believed the mast was on fire and could see smoke coming from below the first stay level from the ground. It was reported that up to one million homes had lost TV and radio signals. Concerns remained about the structural integrity of the mast, which now needed to have a structural engineering assessment. Arqiva confirmed that they were working on restoring service using a combination of temporary structures and existing infrastructure around the region, but were unable to provide a timescale for this. Viewers in the Hartlepool and Redcar and the eastern edges of Middlesbrough should now be able to receive their television services from the Eston Nab transmitting station. The frequencies of the Eston Nab relay have been altered to match the frequencies of the out-of-service Bilsdale frequencies for the PSB services, and COM TV services are provided by a temporary mast to the same area, using Eston Nab’s