Access is via the spare wheel hole.
There are several possibilities: the catches may have come loose or even fallen off from the wooden frame. I know of several where the fixing bolts have dropped out.
Alternatively it could be a broken or maladjusted bowden cable; again adjustment is done from the spare wheel hole.
Finally, if the bonnet type catches have gone out of line with the entry holes, it could be that the hood itself has moved
laterally. Look at all the joints on the hood frame and you will see that there is a slotted linkage each side which will allow the base of the hood to slide back and forth by a couple of cm.. The allen screws that hold it can come loose.
