Ha!Ha Ha! Now theres an administrative challenge (but how profitable !) You'd have to have a paid all party council working party for 6mths (only on bog-standard expenses though) to come up with --ah, let me see, at the moment you only pay sewage charges on the same volume of water that comes
into your house. Right ,ok seemples, they put an instrument on your house's sewage pipe to measure outflow accurately !! The difference between the volume of the fresh water and the volume of the waste water, is the new turd tax !
However, I mentioned a committee ----which will need to justify itself wont it , so I think it will have to take a good length of time to ponder the project .It must look sufficiently complicated of course, so I suspect they will have to call in scientific experts and consultants to thoroughly examine this new challenge , till finally, amazingly , they will come up with their hard won conclusions .Stuff like...
'In fluid mechanics, displacement occurs when an object is immersed in a fluid, pushing it out of the way and taking its place. The volume of the fluid displaced can then be measured, and from this the volume of the immersed object can be deduced (the volume of the immersed object will be exactly equal to the volume of the displaced fluid).'
oh yeah! Archimedes Principle !!! ...which we all learned when we were about 11 !
Ha! ha! Bring it on!