# The Traffic Signs Regulations and General Directions 2016, Paragraph 18

Extent: E+W+S

A blue light beacon may only be placed—
(a) in combination with a sign provided for at item 4, 5, 7, 8 or 9 of the sign table in Part 6; and
(b) by a police constable or a person acting under the instructions (whether general or specific) of the chief officer of police.

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Source: https://www.legislation.gov.uk/uksi/2016/362/schedule/13/paragraph/18 (the official version)
Page: https://openlegislation.uk/traffic-signs-regulations-and-general-directions-2016/schedule-13/paragraph-18
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.