Haven't got a DIY but basically the top mount nuts are located under the plastic trim pieces at each side of the wheel well.

Lift the floor up and you will see 2 pieces of plastic either side that hold the jack handle etc. There are plastic nuts located in some of the holes in these. Once bits removed the pieces can be pulled out carefully.

You will then see a rubber boot which you just pull off which will reveal the fixing points for the top mounts. The bottom shock fixing bolt/nut is visible from underneath.