Operated by Lloyd's Register, on behalf of over twenty water utility companies, the Water Industry Registration Scheme (WIRS) permits accredited organisations to undertake works regarding water mains and supplies to properties. SNR ENG Ltd is an accredited water mains designer with experience in numerous supply areas such as Affinity Water, Anglian Water, Bristol Water, Severn Trent Water, South East Water, South West Water, Southern Water, Thames Water and Yorkshire Water.