Water company came to my old flat, "impossible" to install a meter. My water bill halved because of their assessment. Of course, I had lived there for 5 years,

Water company came to my old flat, "impossible" to install a meter. My water bill halved because of their assessment. Of course, I had lived there for 5 years, had been trying to get a visit for 1 year and hadn't changed my water usage. Still no rebate was offered!