Afternoon all, first time I've looked in here for years.
Jason - How are you mate? It's been ages!
As for the Cherwell, I can only agree with everything you've said. The canal has a lot to answer for IMO, and you should be congratulated for fighting the new marina, the river needs people fighting it's corner.
I always remember the first time I saw the point at which the river flows into the canal just below the Aynho Road, and exits again over a weir - above the junction it looked fine and as it should, but after passing through the canal it immediately picked up a horrible brown colour. This was over 10 years ago, and by the time it got down to Clifton it used to run pretty clear again, clear enough to spot fish even. Now however that colour seems to be throughout the entire river, and we basically stopped bothering to fish at Clifton as catches dropped off so noticeably. The flow still seems to be ok, and maybe the fish are still there, but the otter can't have helped and the colour really does put me off.
I fished the wides at the start of the season this year having not been up there for years, and walking down to the weir at Shipton was a terrible shock - I know the rivers been in decline but that was something else. Two ducks standing knee deep in a puddle of stagnant water was not what I wanted to see