What to do in case of nuisance from neighbors?

Questioner

My neighbors keep doing things without permission on my side of the property line. Especially at the front, where we have a "shared" garden, so there's no clear boundary. For example, they remove tiles and what they consider weeds on my side of the property line, and they often put their garbage bin on my side of the line. Is that allowed? And if not, what can I do about it? Am I allowed to put their garbage bin back myself, for example? I've tried to confront them about it a few times, but the neighbor then becomes aggressive and threatening. That's why it's important for me to know my rights in this matter. Thank you in advance!

Questioner

There's probably a property boundary, but you might grant each other rights of way, or at least the gardens/plots overlap because they're paved. Besides the easement I mentioned, which clarifies rights and obligations, there's also a joint ownership. This also clarifies rights and obligations that answer your questions. Once ownership is shared, the owners must request permission from each other for repairs, replacements, or other uses. You can consult the land registry to determine the boundary.