The one that was blocked would ,if it hadn't have been blocked, have sent the overflow from the stream onto, into,? the cow houses\cubicles in Berrow Farm. I THINK correct me if I'm wrong.
That is correct.
The corrugated iron was mentioned by Charlie to explain what it was that was blocking the culvert and why it was tricky to remove (in my head the sheet was lying flat against the drain /grill of the culvert.
Ed mentioned it to signal that it was the same culvert.
although given that removing the blockage was going to cause water to flood Berrow farm 1) why would Charlie want to remove it 2) why did Berrow farm not flood when he unblocked the culvert because I thought the plot was that he had but had in the process broken his leg.
In addition, teh environment woman said they check them reguallry. so teh conclusion that David is oming to ios obvioulsy that someone saw the floowing about to occur realised what was going to happen to Berrow and blocked it deliberately.
Which woudl suggest Rob as he was certain Berrow would be fine.
The only thing about that is that I am trying to remember where Rob was in the lead up to the flood. I thought there was some implication he ahd been skiving (probably eating lunch) and not at the farm and it was hwne he was asked if he thought he ought to go there that he said no, Berrow will be fine.
Adam warned Charlie about the flood alert didn't he. so it could have been Charlie, but then why take it out again.
IMo this is quite a good plot as long as it does not turn out like the DNA one and it turns out no one put the debris there it was just washed in by the flood.