I live in a flat above an empty shop with another shop to the rear of my property accessed through a close adjacent to my own, there is a suspected leak or blockage in this property which they continue to ignore and every now and again it causes a flood in another shop next door to the one below me...the shop called out a plumber who simply turned off the mains supply and left. now i have no water in my flat, this has happened before and i discovered that the shop to the rear has an internal stop valve which means there is no need for it to be closed off at the mains, is it legal for someone to turn off my water without informing me? what are the repercussions if i have it turned back on?