I just don't understand why its so much! Just checked my banking and my water bill has gone up to just shy of £100 a month. 2 bed end terrace, 1 adult, 2 dc.
I do 4 or 5 loads of washing a week. No shower in the house, but the bath is used maybe 4 times a week max (we shower at swimming/gym) If i have a bath the kids get in after.
Slimline dishwasher used 4 or 5 times a week.
10 litres of water a day for animal purposes, less in winter as catch rainwater.
Very occasional paddling pool in summer
Does £100 a month sound a lot to you?