I recently moved into a new build house, one of my boundary walls (I confirmed ownership from the title plan) has had a section of the Victorian topper tiles removed by my neighbour before I moved in and probably before I owned the property. He was seen doing it by another neighbour, the toppers have been used in another part of his garden and where they were removed on my section of wall he has used to build brackets for a shed that is fully attached to his side of my boundary wall. I’ve done some research, and it looks like taking the toppers is theft, altering my wall is criminal damage and attaching a shed to my wall without planning permission is in breach of planning regulations. Hoping to get some advice on what to do next, particularly as all of this happened in the early days of the development before I even owned the property. Thanks, Steve