We live on Dunstans Rd and experienced the same problem. Once again, Thames Water said that nothing could be done. It became so unbearable that eventually we invested in a small breakout water tank with pump in the cellar which works with our combination boiler. Morning showers are no longer a problem. What still gets me though is that we live in a maisonette with one water main entering the premises, yet both we and our upstairs neighbours still have to pay full water rates.