Had sweetcorn and prawns with me yesterday and was catching roach "on the drop" close in on sweetcorn. As I was playing (what turned out to be the largest fish of the day at just under a pound) I saw he was being chased by a perch.
I swtiched to prawn and got nothing. Switched back to sweetcorn and got a few more roach but the swim was dying (my speciality!). Soon the swim was dead. I tried legering prawn for the rest of the day over a bed of liquidised bread, hemp, corn and cut up prawns and got nothing else. Not blaming the prawn, I think the fish just weren't there but it didn't do anything for my confidence.