Hi Mick,
The male fish have a bright blue band running across the head, above the mouth.
However, I have read recently that after the females lay their eggs, the male fish guard the nest.
So are we being responsible by taking the male fish, which then leaves a nest of eggs to be eaten by predators.
In a bit of a quandry over this one as I always return the females but take the odd male or two.
Perhaps someone else can add to this.
Anyway - good luck on your bream fishing when you do get down.
Neal