My other half has decided to go shooting with his friends so we are applying for a gun licence. I have bought him a gun safe for xmas ( yes i am an amazing wife !! ) but we are having some debate about what type of wall we can attach it to. We live in a semi detached house and basically need to know if it has to be attached to one of our external walls or we we can attach it to the wall between us and our neighbour as we assume this is a brick wall. Any advise would be greatly appreciated as now b & q are open we are off for some bolts !! Oh the joys