Mondeo "capless" fuel filler - a liability?

[Graham E]

I have the dubious benefit in kind that is a company Mondeo - inherited as a new starter. It has a very bizarre setup where there is no fuel filler cap (apparently a selling feature?), but the flap on the filler doesn't lock when you do the c/locking either.. Is this not a potential for mischief? I can't spot anything stopping vagabonds posting things in etc. Is this normal, or is the fuel filler flap meant to lock in some way?

[Graham E]

unfortunately, the Mondeo has no locking mechanism whatsoever - volvos are safer, hence the security =)