We have received an (unsigned!) letter from our next door neighbour. I suspect it is a form letter provided by the company that is doing their proposed loft extension. It says that they need to remove bricks from their side of the party wall (1930's semi) to fit metal plates to hang RSJs to support the loft extension. They want us to sign and return the letter to show we have no objection. The letter says that their contractor will take responsibility for any damage to our property and will write confirming that if we want them to.
Is this the normal procedure for this? If the contractors are willing to write to us why would we need to request this? If there were damage to our property how would we show it was caused by their works?