We've always used a rainwater harvesting system to water the plants, flush the loo and wash clothes.
Hosepipe bans are utterly rediculous and archaic. Most people now have a gun on the end of their pipe so it turns off when not in use, its not like the old days where it was left running, and there's no ban on washing cars or watering gardens the hard way so the same water is used, if not more as a gun on a hose only needs to run for a second whereas using a bucket means wasting loads in a throw. Stupidity.