http://www.pushhogg.com/energy-saving-quotes/

Who said to save energy “you should take a bath with a neighbour” in 70′s in UK?
I have a feeling it was a labour MP trying to make light of the blackouts and water shortages, but I can’t remember. A colleague wants to use the quote in a lesson next week. Any help appreciated.
Although I much prefer the answer above, it was in fact on a list of recommendations put out by water companies to try to save water. The actual quote was for a bath full of water to be used IN TURNS by members of the family – and it just became a joke about sharing a bath. As children we always shared the same bath water – I was lucky and always got to go in first, then my brother then my dad!
Things we don’t need