CF-yup, me.
£30 meter from eBay.
Took a picture of it showing 0 when I bought it then take a picture every 6 months as proof. Tell Anglian the numbers and they knock the money off.
Just MO but for those that are saying their water company don't allow it. Don't ask them, TELL them you want it reduced. Record all your water usage, when they relent-which they must-they will backdate it too.
Water on the windows doesn't go down anyone's drain, who has a drain under a window?!
Most if it will evaporate, what hits the floor will usually go into the soil or evaporate too.