This week, due to continued dry weather in the UK, my plants needed watering. I watered them from water butts (and have been doing for weeks now). I’ve got 300l of capacity, and it’s now almost empty because of this extended period of dry weather.
If you’re in England, you can likely get discounts on water butts from your water supplier. (For example, https://www.savewatersavemoney.co.uk/products/garden)

