The Traffic Signs Regulations and General Directions 2016 No. 362

SCHEDULE 13 Signs only for use in temporary situations

PART 12 The Schedule 13 General Directions

18.  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.