The Broadmoor Sirens were installed in 1952 after John Straffen escaped from Broadmoor and murdered a child in Farley Hill, Berkshire. They are similar to air-raid sirens but employ shutters to produce an alternating "high – low" warning tone.[2] More sirens were added in the 1960s[3] after discussions in the House of Commons raised the issue that the sirens' two-mile (3.2 km) radius was insufficient for nearby towns such as Camberley and Wokingham.[4]
The thirteen sirens were created with the intention of warning residents in surrounding towns and villages to remain in their homes and keep their children supervised following the escape of a Broadmoor patient. The sirens were activated as a test at 10 am every Monday.[5] The sirens are susceptible to electrical interference. In 2014, the Bracknell siren was activated accidentally during an electrical storm.[6] In 2019, the sirens were also accidentally activated due to a technical fault.[7] The thirteen satellite sirens were due to be decommissioned during 2018, with one siren remaining in the hospital grounds.[8]
The 1978 hit song "Sound of the Suburbs" by Camberley group the Members refers to the regular testing of the sirens.[9]
Future
The last time the Broadmoor Sirens were activated because of an escape was in 1991, although they were activated in 1993 because of an attack at the hospital.[10] In 2014, there were plans to remove seven of the thirteen sirens. This was because Broadmoor had added a second security fence around the hospital and intended to upgrade the remainder of the sirens so they had a five-mile (8.0 km) radius to improve on the two-mile radius of the sirens, which were installed in the late 1950s and early 1960s.[11] Local residents objected to this on safety grounds due to there being sixteen primary schools within the radius of the sirens.[2]
It was reported on 2 June 2016 that Broadmoor planned to remove all except the hospital siren, with alerts issued instead via television and social media.[12] The individual sirens were replaced by a single longer-ranged siren at the hospital.[13]