Neighbour cutting my tree then throwing cuttings on my garden

[twinsufficient]

Caught my neighbour cutting our tree (only the parts that were overhanging her garden) but then she threw all the cuttings onto our garden. To me if I was in her position I would've cut what I needed but have got rid of the mess myself. I know it's our tree so I suppose it's our property but she could've asked if that was ok to dump the cuttings or just use her own garden waste bags.AIBU?

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WHAT???
some fucking law allows her to throw it in your garden?? Well, there is a law somewhere about beef bones dating from 18th cent. still in operation.
It would never occur to me to chuck the branches of the neighbour's shrub which I cut into their garden! it's my problem that I cut them and I dispose of them. Are they so precious for a busy family with 2 kids that they would need them to dispose of them? Like fuck.