Apologies if this the wrong section.
Out neighbour wanted to widen their side passage and their builder asked if he could cut out a sizeable corner of our decking (about 1m square) and also cut back the fence about 1m to enable this.
There had been no prior discussion - this was just the builder asking as I left the house.
Unsurprisingly I said no but would be back later and listen more then.
When I returned, they had gone ahead and done it.
Can anyone advise of my legal remedies?