This applys to ALL Roads. its very clear.
You MUST
use headlights at night, except on restricted roads (those with street lights not more than 185 metres (600 feet) apart and which are generally subject to a speed limit of 30 mph)
use headlights when visibility is seriously reduced (see
http://www.highwaycode.gov.uk/21.shtmlU color=#0000ff Rule 201/U).
ensure all sidelights and rear registration plate lights are lit at night.
Laws RVLR regs 24 & 25 & RV(R&L)R reg 19
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You MUST NOT
use any lights in a way which would dazzle or cause discomfort to other road users
use front or rear fog lights unless visibility is seriously reduced. You MUST switch them off when visibility improves to avoid dazzling other road users.
Law RVLR reg 27
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You should also
use dipped headlights, or dim-dip if fitted, at night in built-up areas and in dull daytime weather, to ensure that you can be seen
keep your headlights dipped when overtaking until you are level with the other vehicle and then change to main beam if necessary, unless this would dazzle oncoming traffic
slow down, and if necessary stop, if you are dazzled by oncoming headlights.
[Edited by Tomclio182 on 07 June 2004 at 12:48pm]