Hello and welcome from a fellow Scot.
i had a similar problem when i came to change my wheels.
the only advice i can offer is to look around the underside of the car for something solid that wont move when you jack it up.
look in the area near the wheel on the underside of the car.there are a couple of solid bolted parts possibly relating to the suspension or the arms that attach to the hub that will allow you to jack it up safely without damaging anything.steer clear of the chassis altogether, as you dont want to go through it, like someone has done to my golf.
my terminology is really poor i know, but my minds a bit blank on what the correct name for these parts are (on 12 hour nightshifts for the past few weeks offshore).
hope that helps mate, if not someone will be on soon with a proper answer for you.
im from Aberdeen, where about are you from?