If a telecommunications development requires planning permission, the planning application will be assessed having regard principally to the visual impact of the proposal. Such an assessment is made in respect of the design and scale of the structure, the context of the site and the number of visually prominent telecommunications installations within a local area.
In terms of design and scale, the structures that have the greatest impact are latticework towers, which tend to be much more visually prominent than other structures and can be seen over a wide area. Poles and antennas are of a smaller scale and, as such, their impact is generally limited to the local context, however their visual impacts must still be assessed.
The proliferation of telecommunications equipment in a local area has the potential to cause a significant visual impact. The sharing of existing support structures (co-locating) is viewed as the most appropriate and preferred way to limit the number of telecommunications structures around the island. If co-locating is not possible, it is preferential for equipment to be located on an existing building rather than be freestanding in order to minimise visual impact and, in all cases, the installation of equipment in visually prominent locations should be avoided unless required for operational reasons.
Locating telecommunications equipment in the roof space of existing buildings, or disguising telecommunications equipment, are appropriate alternative methods of ameliorating visual impact.
Other factors may also be considered as part of the assessment of a planning application for telecommunications development, such as impacts on highway safety, aircraft navigation or heritage assets such as listed buildings or historic areas.