take off wheel and remove hub bolt (30mm or 32mm deep drive socket needed)
then unattach bottom ball joint (prob need to remove anti roll bar link bolts for this) and track rod end from suspension strut.
(ball joint and hub bolt have split pins that need removing)
remove brake caliper from strut (2x 10mm allen key bolts) and tie up somewhere safe, now using a plastic ended hammer hit driveshaft towards gearbox whilst pulling strut towards you.
once this is off undo the 3 strut top bolts (13mm) and strut will come away. Take a set of spring compressors and compress the spring enough to remove load from strut tops, then using a 17or 19mm ring spanner undo the damper bolt whilst holding the damper top with a spanner (10mm i think).
Then dismantle, remove spring insert new spring and reassemble making sure everything is in the order it came off.
Then reassemble suspension set up.
Jack whole back end of car in the air, undo bottom damper bolts (hold damper to rear beam) which with some force will allow the rear beam to swing down.
(could do top bolts on rear dampers but from experience ive found you end up hitting the inner arches removing underseal)
springs will now come out, and new ones can be inserted. then jack rear beam up untill dampers come back into line and tighten the bolts.
think ive not forgot owt, hard to remember when not looking at car