Piece of piss to do. Just make sure you use grips or a spanner on the filter ends when undoing the unions, or you'll spin the whole lot and damage your fuel lines. Same applies when refitting, grip the filter as you tighten the banjos. Stick your head under the sill, in front of the o/s rear wheel and you'll see the assembly, the filter is the big canister on its side, but you'll figure that as you'll have the new filter to hand..