frequencies. On 19 August, transmitter operator Arqiva announced that an increase in power would enable 250,000 households in the area to receive a signal from the Eston Nab transmitter. On 6 October 2021, Arqiva carried out a controlled demolition of the mast, as the structure was found to be irreparably damaged. Sections of the mast have been retained for investigation purposes, with plans for a replacement permanent mast to be built on the same site. Temporary mast (2021–) Following the destruction of the first mast, Arqiva constructed a temporary mast in a nearby former quarry site. The mast is high and commenced operation on 13 October 2021. Replacement Plans have been drawn up for a new mast, which will be built on the site of the original mast. The new mast is proposed to be a guyed lattice type with total structure height of . The top mounted UHF DTV antenna giving a total height of . The replacement is expected to be completed by September 2023. As of September 2022 construction of the new mast had started, with the first sections visible in place at the site. Coverage Coverage extended throughout Teesside and the surrounding regions, encompassing north North Yorkshire and southern County Durham. This included Harrogate and York to the south, Filey and Whitby to the east, Middlesbrough, Stockton, Darlington, Bishop Auckland, Hartlepool, Peterlee, some areas of Seaham and some areas of Sunderland to the north, and Barnard Castle and Worton to the west. Channels listed by frequency Analogue radio Digital radio Digital television In July 2007, it was confirmed by Ofcom that the television frequency assignment after digital switchover would be such that a wideband or group K aerial would be required for reception of all six multiplexes. However, the three public service multiplexes would still fall within the station's original analogue frequency range assignment of aerial group A. The digital switchover started at Bilsdale on 12 September 2012 and was one of the last transmitters in England to complete this operation on 26 September 2012, the others being Pontop Pike and Chatton in the same region. On 13 November 2019, due to the 700 MHz Clearance Programme, the following multiplexes moved frequencies: BBC A from UHF 26 to UHF 21. Digital 3&4 from UHF 29 to UHF 24. BBC B from UHF 23 to UHF 27. Arqiva C and D moving to UHF 55 and UHF