I just spotted that Thames Water offer free water saving devices to residents, including a water saving shower head. Have a look here:
And if you’re east village, have you checked you’re getting your discount for rainwater going through the park filter beds rather than the Thames Water system? (I forget what it’s called)
Thanks for the tip - I didn’t know about that… I’ll give them a call on 0800 980 8800.
My bill says they are open Weekdays 8am to 8pm, Sat 8am to 6pm