K,

older housing the rain water goes down the drain to the sewage works, our 1980s house does this.
Modern houses the rainwater has to go to a soakaway and not into the sewage.
I'm not sure when the change was made and it is not retrospective, thank goodness.

Peter


Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...