Thames Water charge refund

We'll be refunding residents any commission we received as part of an historic agreement with Thames Water.
Until October 2018, we collected water charges on behalf of Thames Water. This was common practice for local authorities and housing associations, and as part of this historic agreement, we received a commission for this work.
It was standard practice for Thames Water to calculate the bill, which was then passed on to residents and collected along with rents. Residents paid the same as if they had paid Thames Water directly.
Following a decision from the Court of Appeal, we now know we unknowingly overcharged residents by the amount of the commission Thames Water paid us.
We will refund the commission payment, including interest, to existing and former residents who paid for their water between 30 September 2016 - 30 September 2018 (when our contract with Thames Water ended). The refund will depend on how long someone has been a THCH resident and how much commission was paid by Thames Water for collecting the charges on its behalf.