HC Deb 22 January 1985 vol 71 c365W
Mr. Evennett

asked the Secretary of State for the Home Department what proportion of unmarked operational vehicles used by the Metropolitan police are equipped with (a) two-tone horns or sirens and (b) detachable blue lights or beacons.

Mr. Giles Shaw

I understand from the Commissioner of Police of the Metropolis that of the 675 unmarked operational vehicles used by the Metropolitan police, 81 (12 per cent.) are, or will soon be, equipped with both an emergency sound system and a detachable blue beacon. A further 13 have an emergency sound system only.