take all the obvious bolts off, then there is a bracket right under the parker that is bolted to the chassis by one hex bolt. the bracket is secured to the headlight assembly by two phillips screws but i wouldnt advise undoing then as you will probably snap the plastic location pin so just leave it attached to the housing when taking out.
someone should do a sticky on this subject, as well as parker bulb replacement..lol
ah just re read your post. indicator clips in so take the plastic guards out from the wheel arch and pop it out from behind by squeezing the clips unitl it pops out. i dont remember any screws from memory, though there might be one, but i doubt it.