they're for Curry bags!
So you drive back with the boot open and your ruby swinging in mid air?
They are for hanging handbags, jacket etc on while you put the messages/baby buggy in, so that you then put them in last on the top, then when you home easy get the house keys out without having to take everything else out first.
After picking them out of the remains of your Ruby that have slid all over the boot because of the lack of some hooks.......
Two hooks in my boot for that very purpose.
Unless you have the ST... The side hooks are perfect for exactly this situation. I've used mine to avoid this more than once!
Couldn't you just drop the boot floor down to allow the bag to hang?
Yes, but they are not very good hooks. Maybe Spanish carrier bags are smaller but the hooks are too low and not a very 'hooky' shape. Several times I've hooked bags on them only for the handle to just lift off the hook and set the bag free.