HOW DO YOU LIKE YOU YOUR RUBBISH, ON THE BEACH OR IN THE BIN???

This afternoon I went on an adventure down to the beach, and yeah, not getting washed out to the sea this time.
So I collected some rubbish as usual, that has accumilated on the beach.

So then people say it's an accident I didn't realise that I left it. So you say well thats ok everybody does it from time to time.
I know we have a small population compared to most countries, but with 24 millon in population what happens if every person accidentally drops a piece of rubbish.

Rubbish I collected, who's fault is it?

So who's responsibility is it?