I feel your pain. I've had my vans done several times, and not normally at night, but when parked during the day.I don’t know how you get a metal plate on the inside. They only drilled through the outer skin. Think I’ll put dead locks on when it comes back, although they probably have a way round those too
Last time, they attacked the side door in a Lidel car park, in broad daylight.
The deadlock saved my tools, but destroyed my door, and I had to have a new one, and 1/4 panel.
As other have said, if they really want to get in, they will. I have holes cut in doors, big enough for a man to fit through.
They really are scum.....