Gone from parking in my drive to across it

Inconsiderate arsehole & generally problematic neighbour that used to park in my private driveway until the bollard was installed has now began parking across it instead, but only when I am out! Meaning I can’t get in and police are not concerned about my situation. Any further suggestions?

Inconsiderate arsehole & generally problematic neighbour that used to park in my private driveway until the bollard was installed has now began parking across it instead, but only when I am out! Meaning I can’t get in and police are not concerned about my situation. Any further suggestions?