Emley Moor transmitting station, or the Arqiva Tower, is a telecommunications and broadcasting facility on Emley Moor, 1 mile (1.6 km) west of Emley, in Kirklees, West Yorkshire. It was built between 1969 and 1971. The station’s most visible feature is its 1,084-foot (330.4 m) tall concrete tower, which is a Grade II listed building. It is the tallest freestanding structure in the United Kingdom, 7th tallest freestanding structure in the European Union, 4th tallest tower in the European Union, and 23rd tallest tower in the world.
The tower’s official name “Arqiva Tower” is shown on a sign beside the offices at the base of the tower but it is commonly known as “Emley Moor mast”. Emley Moor position as a building or a structure is ambiguous. The tower has a top-floor interior control room at a height of 272 metres which is accessible to people.
There were two towers on the site previously. The first was built in 1956. It was replaced with a 385m tall one in 1964. Unfortunately this collapsed in March 1969. You can read more about this here.
During the Tour de France in 2014, the tower was lit up in an amazing light show.
There are some amazing pictures here.