Citizens Band Radio - History - United Kingdom

United Kingdom

In the UK, small but growing numbers people were illegally using American CB radios during the late 1970s and early 1980s. The prominence of CB radio grew in Britain partly due to the popularity of novelty songs like CW McCall's "Convoy" and Laurie Lingo & The Dipsticks' "Convoy GB" in 1976 (both of which were Top 5 hits) and the film Convoy in 1978. By 1980, CB radio was becoming a popular pastime in Britain; as late as the summer of 1981 the British government was still saying that CB would never be legalized on 27 MHz, proposing a UHF service around 860 MHz called "Open Channel" instead. However, in November 1981 (after high-profile public demonstrations) 40 frequencies unique to the UK, known as the 27/81 Bandplan using FM were allocated at 27 MHz plus 20 channels on 934 MHz (934.0125 to 934.9625 MHz with 50-kHz-spacing). CB's inventor, Al Gross, made the ceremonial first legal British CB call from Trafalgar Square in London.

The maximum power allowable on the MPT 1320 27/81 system was 4 watts (in common with the American system), although initially radios were equipped to reduce output power by 10 dB (to 0.4 watts) if the antenna was mounted more than 7 metres above ground level. The power-reduction switch is also useful in reducing TV interference. MPT 1320 also restricted antennas to a maximum length of 1.5 metres, with base loading being the only type permitted for 27 MHz operation. Over the next several years antenna regulations were relaxed, with antenna length increasing to 1.65 metres and centre- or top-loading of the main radiating element permitted. On 1 September 1987 the UK added the usual 40 frequencies (26.965–27.405 MHz) used worldwide, for a total of 80 channels at 27 MHz; antenna regulations were further relaxed, and the 934 MHz band was withdrawn in 1998.

CB radio in the UK was deregulated in December 2006 by the regulatory body Ofcom, and CB radio in the UK is licence-free. The old MPT 1320 27/81 band will continue to be available for the foreseeable future. The rules regarding non-approved radios, modes other than FM and power levels above 4 watts still apply, despite deregulation. Persons using illegal equipment or accessories still risk prosecution, fines or confiscation of equipment, although this is rarely enforced. AM, SSB and amplifier use are common among enthusiasts. Packet radio is legal in the UK, although not widely used. Internet gateway stations are also beginning to appear; although illegal on 27 MHz, these units are connected to other CB stations around the world.

UK regulations differ somewhat from those in other countries; although AM/FM CB transceivers are legal (since they conform to European specifications), but the use of AM is illegal in the UK. As a result, a European CB operator cannot use AM whilst in the UK but can do so when in Ireland or on the continent. Although the use of CB radios in the UK is limited they are still popular, especially with the farming community, truckers and mini-cab services. The widely-used channel for the Young Farmers Club is channel 11. The normal calling and truckers' channel is channel 19, although many truck organisations and groups use other channels to avoid abuse. Irish truckers who travel to the UK still use 27 MHz AM, since enforcement is lax.

On the 29th Of October 2012, the UK Telecoms regulator OFCOM announced that AM and SSB may be made legal, in the UK by the end of 2013.

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