The short answer is;
Lower Benyons from the weir downstream to where it rejoins the canalised section at Theale river is most defenatly NON-NAVIGABLE. That means no boats, dingies, rubber rings surf boards etc etc without the landowners permission. All of which I have seen!!
As is the very top of Lower Benyons red section, Upper Benyons, Padworth Mill, beat 3b, beat 2 weir pool, the arrow head at Calcot and Whistley mill.
The long answer........well there's not enough hours in the day!!! ...lol
Association Fisheries Officer