Just to add, the two nearest to me were dumped at nature sites and the weirdest thing was, one of my neighbours didn't realise a load of rubbish had been dumped. She also doesn't realise there's a general problem with it.
So she said to me that she'd gone out to look at this place that she'd heard was a nice nature spot, she cycled there just out of curiosity - and came back with no idea that what she was looking at wasn't normal. She said "I don't get what the fuss is - and it's really dirty".
She's not the sharpest tool in the box, but I had heard from one of mum's neighbours that he'd had to report it because when he cycling past, he saw that someone had dumped a load of rubbish seemingly overnight.