§ 74. Mr. Higginsasked the Secretary of State for the Home Department over what distance police car sirens used in the Metropolitan police area can be heard under normal circumstances and under the most unfavourable circumstances.
§ Mr. Giles ShawI understand that under normal conditions in a busy London street the electronic METSOUND audible warning system can be heard by a pedestrian at a distance of between 200m. and 300m. The performance of the equipment is, of course, less satisfactory under less favourable conditions, but it is not possible to give precise estimates of performance characteristics under such conditions.