No problem, with mine there is only two screws holding that piece of trim on, Remove your warning triangle in the behind the small flap
You will see two screws there
You should invest in some trim removal tools if you dont have a set so you dont damage the trim
Remove your two parcel shelves out of the way, careful not to damage the mounts that go into the boot lid. Start at the outer edge closest to the roof and pry the plastic down firmly, there is about 20 metal clips you need to pop out, they will pop load and be very tightly secured if that piece has never been removed before, work your away around to the boot latch. If you get any resistance, change to the other side and do the same.
You can then move to the inner edge of the trim, you should have enough space to use your fingers(with gloves for safety
) now and pull the trim down towards you starting from edge closest the roof again.
There is a lot of small rubber pieces all along the outer edge of the trim piece, half of these will fall off. make sure you replace them before re-fitting. ALso be careful of the rubber mounts that secure your parcel shelf prongs, and make sure these are nicely seated in the mounts too.
If you have power boot lid be careful when you have the trim mostly free as you will need to disconnect the wire going into the back of the switch you need to remove.