When choosing and installing an intruder alarm there are a number of issues that need to be considered in terms of legislation. Domestic burglar alarm systems can be either wired or wireless. Many consumers favour wireless alarms because there are a variety of cheap models available, and they tend to be much easier and cheaper to install. However, wireless alarm systems have a reputation for being the source of a very high number of false alarms caused by incorrect installation.
According to the Metropolitan Police, over 92% of all alarm activations were false alarm calls due to either equipment, communication or user error. While installation of wireless systems is relatively easy, it is still worth taking the time and effort to install such a system correctly. Make sure you read the instruction manual thoroughly. If all else fails get a professional to install it for you; it might be cheaper in the long run.
To minimize the impact of false alarms, the UK police adopt a policy which classifies alarms into two types, A or B. Type A alarms are remote auto-dialling or monitoring system alarms. These alarms send a signal either to an alarm-receiving centre (monitoring system) or a nominated keyholder (remote auto-dialling) when the alarm is activated. If used, an alarm-receiving centre will contact the nominated keyholders and the police who will respond subject to confirmation procedures.
When thinking about using this type of system it is important to know the policy of the police in terms of attendance. If using a remote auto-dialling system the police will not attend if called by a nominated keyholder, even if audio or visual evidence is available (some remote auto-dialling systems can send pictures to mobile phones). They will only attend following eyewitness confirmation that the residence is being burgled.
The police will attend if contacted by an alarm-receiving centre provided the system is maintained and used in accordance with British Standards. The alarm must be registered with the police and identified by a unique reference number. In addition, a police response will be conditional upon the number of false activations in any 12 month period.
Type B alarms are audible only alarms. If triggered these alarms will sound but are not associated with any notification. These alarms and auto-dialling alarms can be problematic due to noise pollution. The impact of a false alarm on the neighbourhood can be underestimated, but there are strict by-laws which govern this type of problem.
If an alarm sounds for more than 20 minutes and an Environmental Health Officer is satisfied that the noise is a statutory nuisance then formal action will be taken to silence the alarm. This can involve obtaining a warrant to enter the premises and the use of contractors to gain access, deactivate the alarm and if necessary change the locks to secure the premises. It is advisable that the alarm is installed with a 20 minute cut off device, and that two separate keyholders are registered with the local authority and the police station. This helps to avoid causing a statutory nuisan
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