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Damn, just spotted the thread and all the reely good puns have gone. I hake it when that happens.
There probably weren't any judges around. Here in Jersey (so probably the same in Guernsey), fishing contests are generally operated on the basis of trust. Basically you go to wherever you wish around the coast of the island, land what you can then report back to central weighing stations with your catch.
I can't believe people actually care about this sort of thing.

I can't think of any puns to insert into this sentence...
The last comment from that link says it all, "one of the judges recognised the stolen fish" lol.