The Belmont transmitting station is a broadcasting and telecommunications facility next to the B1225, 1 mile (1.6 km) west of the village of Donington on Bain in the civil parish of South Willingham, near Market Rasen and Louth in Lincolnshire, England (grid reference TF217837).

[1][2] Before this it was 1,272 feet (387.7 m) high and was considered to be the tallest structure of its kind in the world (taller masts, such as the KVLY-TV mast in the United States, use steel lattice construction), and the tallest structure of any type in the United Kingdom.

After the top section was removed, the mast's reduced height relegated it to the second-highest in the UK after Skelton in Cumbria.

On clear nights its bright red aircraft warning lights can be very widely seen across much of Lincolnshire from as far north as the Humber estuary and Barton-Upon-Humber; from the west of the county it can be seen from Lincoln, Gainsborough and Grantham; from the south of the county it can be seen from Spalding and Bourne; and from the east it can be seen from Skegness, Mablethorpe and most areas along the Lincolnshire coast.

[5] The concrete foundation was built by the end of October 1964, with tube sections being added from November 1964 at the site, near Benniworth.

The imperial measurement was the accepted value quoted by publications including the 1993 edition of the Guinness Book of Records.

Following a re-organisation of ITV coverage in 1972, from 1974 it started transmitting neighbouring station Yorkshire Television instead, which it continues to do to this day.

On 4 March 2020, Belmont was due to complete its 700MHz clearance and will become an A group transmitter, excluding the temporary MUXES 7 and 8 (see graph).

Technically the advent of C5 analogue complicated the issue for a few months prior to (dual) running digital transmissions started in 1998.

First transmissions from the site: ITV's 405-line television service was fed by off-air reception of Mendlesham at Great Massingham in Norfolk, with an onward microwave link to Belmont via an intermediate point at Winceby in Lincolnshire.

BBC1 was initially fed by means of an off-air rebroadcast of Holme Moss but this was plagued by co-channel interference from the continent.

[19] On 19 March 1969, the Emley Moor mast collapsed, taking Belmont's BBC2 transmissions off-air for several days.

[23] After changes to the regional structure of ITV in 1972, Belmont stopped being a relay of Mendlesham and became a main station for Yorkshire TV.

The microwave link from Leeds to Belmont apparently ran via Emley Moor, where the IBA could insert test transmissions, such as Test Card "F" Both the BBC and ITV 405-line VHF TV services from Belmont were discontinued early[24] in mid-1982, and when Channel 4 began formal transmissions in November that year it was radiated on UHF from the site: Belmont started transmitting the UK's final terrestrial analogue UHF TV service: Channel 5.