Fog lamp - spot lamp: which side??

[dekhelia]

Just bought a pair of Lucas lamps, one fog and one spot. Is there a convention (or even a logical reason) for which type of lamp goes at which side of the front bumper?

[Walrus]

For single lamps on the front, fog left, spot right. The idea is that a single front fog helps you see the road edge, pedestrians, etc more easily and the spot is intended to illuminate more of the road ahead (plus it balances the look!)

[AdrianC]

Legally, they need to be paired. The only lights that don't need to be paired are rear fogs.

[Walrus]

Legally, they need to be paired. The only lights that don't need to be paired are rear fogs.

Not so:http://www.legislation.gov.uk/uksi/1989/1796/made About halfway down:

SCHEDULE 6
requirements relating to optional front fog lamps

1. Number–

(a) Any vehicle not covered by sub-paragraph (b):
No requirement

(b) A motor vehicle, other than a motor bicycle or motor bicycle combination, first used on or after 1st April 1991:
Not more than two

[dekhelia]

Thanks for the replies, gents. Very informative.