Jeff Woodhouse
Moaning Marlow Meldrew
Yes, I checked that out with our chairman this afternoon and he agrees. The London Stone at Staines was the tidal marker in the olde days before all the locks and weirs were put in place, though.The Tidal starts at Teddington weir as that is the first full on obstruction although a high spring tide will top that on occasion. It's pretty much coarse fishing but there are small bass and flounders there sometimes, not enough to justify them as your quarry given that you will catch too many coarse fish. Common sense really. At Richmond you have the half lock which is quite a bit of engineering, not as a flood defence but there to keep the water in for navigation at low tide, it always was interesting fishing above and below the half lock at low tide during the season, the tide when on the flow goes straight through unhindered.
There was a piece of canal near Rickmansworth where if you sat on the towpath you could cast well over the other side into where the river rejoined and that would be legal or hard to prove, but if you sat on the opposite bank and fished the same spot, it would be illegal.
I do wish more people would spin for trout in the Thames (and use a light wire trace JUST in case) just to find out how many trout are in there. We had a day on our fishery once when my mate caught 9 or 10 brownies and I had three. I also had a sea trout on New Years Eve 2018. They are there, not many maybe, just no one fishes for them. Blame the EA for destroying their spawning habitat.