Hi, we've had plans drawn up and approved for a loft conversion. We also want to remove the chimney breast in one of the dining room on the ground floor. I've Googled (a lot!) and know that we need a party wall agreement with our neighbours. Is there a standard format for serving them a party wall notice? Do we just drop them a note saying what work we're having done? What if they don't sign an agreement? (This a distinct possibility after we objected to their teenage son practising his drums and electric guitar at all hours of the day).