misconnected drains

Does anyone have any experience of being told by Thames Water that they have misconnected drains (foul water connected to surface water drain) and then left with a big old bill to clear up the mess.
Am doing an article for a national newspaper and urgently need a case study. IF anyone is able to help, then emal me back ASAP on
ben at benrooney dot com, or call me on 01371 811288
I need to speak to people no later than the end of bank holiday monday (25 Aug)
If you can help, it would be very much appreciated.
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