Reading that through, Mike, it does state that front fogs are supposed to help you see forwards, but I've always put them on (in really thick fog) to let others see me.
[/highlight]
Can't read all that at the moment, watching 'Midsomer Murder' ................

Yes, but you would have your headlights on anyway, I tried without and could not see enough. Your link goes on to say, as I have thought, they old fashioned yellow fog lamps, that we used to fit, well I did anyway...........

A piece of your link;
So, what is a good fog lamp? A good fog lamp produces a wide, bar-shaped beam of light with a sharp horizontal cutoff (dark above, bright below) at the top of the beam, and minimal upward light above the cutoff. Almost all factory-installed or dealer-optional fog lamps, and a great many aftermarket units, are essentially useless for any purpose, especially for extremely demanding poor-weather driving. Many of them are too small to produce enough light to make a difference, produce beam patterns too narrow to help, lack a sufficiently-sharp cutoff, and throw too much glare light into the eyes of other drivers, no matter how they're aimed.