J Hancock, do you know for certain of a particular set of T&Cs that states what you say? If you could provide a company name or the name of a government body or whatever, I am fairly sure in a few seconds I could find their T&Cs online. I would be very interested to look up the actual wording of the original document.
This info, found in a few seconds too via the magic of Google, from a company in the industry, suggests that this "they own the rainwater" idea is an urban myth imported from the USA, where some states do have that sort of regulation:
https://rainharvesting.co.uk/collecting-rainwater-illegal-uk-everything-need-know/
https://rainharvesting.co.uk/collecting-rainwater-illegal-uk-everything-need-know/
"Is it legal to collect and use rainwater in the UK? The answer isn’t necessarily obvious if we look at precedents from elsewhere in the world. In the American state of Colorado, for instance, it is legal to sell water butts, to own them, but not to use them for the purpose for which they are intended! The water rights and laws of the arid Western US states go back 150 years to when it was a case of first come, first served for everything from land to gold digging claims to water rights. So a homeowner is deemed not to own the rainwater that falls on their property and it must not be harvested. The rainwater belongs to the owners of nearby water rights in the expectation that the rainwater will eventually make its way onto their groundwater supplies. It may seem ludicrous to us living in the damp climes of the UK but that system has a grounded basis in history as the article in the Washington Post explains very well. Rumours abound of individuals being prosecuted and even sent to prison for harvesting rainwater off their own roofs.
What Is The Legal Situation In The UK?
Scare stories like these from abroad may have planted seeds of doubt in the minds of UK citizens regarding the legality or otherwise of rainwater harvesting here in Britain. In fact, it is perfectly legal and actually encouraged by most water companies, especially in the drier south eastern counties where rainfall is significantly less than along the west coast.
However, whilst there is nothing to prevent householders from collecting rainwater, there are standards and regulations that apply, especially if a cross-connection is made to the mains water supply. There are also regulations governing the supply of water for consumption, as well as general health and safety rules as one would expect."
Edited By Bikepete on 16/06/2019 13:17:06
Edited By Bikepete on 16/06/2019 13:17:45
Edited By Bikepete on 16/06/2019 13:28:20