Sorry if I have caused you guys some grief, I was just hoping someone could guide me through it. I have found other people with the same problem but forgive me, I can be a little thick sometimes.
If it helps, to say what skill sets I do have, I would say I'm not a novice, but neither am I a mechanic. I am a mechanical engineer by trade and fabricator and have done the odd things such as changing suspension, exhaust, etc on cars so I can do most things but do struggle a lot of the time with cars.
I have managed to take the undertray off and can see the cable that runs through the middle from either side of the latches under bonnet. I can't see anything to release them manually but the cable is slack so assume that is what is broken - it is still attached on both latches either side.