False alarms generated by automatic fire alarm and fire detection systems account for more than 40, 000 of call outs every year, making up a third of all incidents for fire crews in London.

BBC: London Fire Brigade may recoup ?1.3m from false alarm calls

Of course the first call of duty after arriving was to get the fire going.

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The emergency number used to call ambulances and the fire service was out of action for more than an hour.

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