To get access to the latches I had to take both front wheels off and then the plastic covers. I've started with the latch on the left because mine is RHD. Took off the left wheel, unscrew the plastic underneath the wing but the windscreen washer bottle was in the way. Took it off and then I was able to see the latch and the cable. I've pulled the cable to the right strongly and the bonnet popped up on one side. Then I've put everything back together, did the same on the other side and success. I've replaced the whole system for a piece of mind.
I suggest you start with the right latch because your handle is on the left. The cable firstly goes to the latch on the left and from there another cable to the one on the right.
Took me a bit over 30 min. Hopefully this will help.