you have to take the headlight out to remove the side light bulb and the bulb you need is a 501 fitment, lots of people change them for LED's they look much better
to replace the fog light bulbs simply put you hand round the back of the fog lights and twist the bulb then it will come out
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Red Escort 1.6LX
Then - Red Escort 1.4
Then - Silver Fiesta ST 170BHP
Then - White Fiesta ST MR200+
Now - Mitsubishi Evo IV Forged 2.3 500BHP
and Mondeo Mk3 2.0TDCI