i aasume u mean the bulb in the main headlamp area and not the indicator bulb on the side of the car.
hopefully someone may come along with a pic or two. but lift the bonnet. behind where the indicaotr is situated is a black plastic cover which should be released in a bayonet style IIRC. the hardest part is the complete lack of space. i had to unbolt the battery and wiggle it a bit out of the way. maybe enrolling the help of someone with tiny hands may make it easier.
You basically prise the indicator unit out with a flat bladed screwdriver or something similar, taking care not to break the clips (one at each end) that hold it in. IIRC one end of the unit has a flat end (think its the 'outer' end) where you are supposed to lever it.