From the 8 October 2004 helicopters with a maximum total weight authorised of 5700 kg or less, and a Group B C of A, will be exempt from the requirement to carry parachute flares at night provided:
(a) the flight is not for the purposes of public transport;
(b) the helicopter is equipped with either:
2 landing lights, one of which is adjustable in flight so as to illuminate the ground in front of, below and on either side of the helicopter;
or
2 landing lights, in addition to the helicopter standard equipment, which shall be adjusted so as to illuminate the ground in front of the helicopter;
(c) all landing lights are capable of being operated at the same time; and
(d) the helicopter is equipped with a landing light modification approved by the CAA.
Full document here:
ANO 2000 Exemption
Tudor Owen