Interseting that you're catching small barbel Nick, good sign for the future.
I'm not sure weather bread will be overly productive, will definatley catch you
chub though.
I caught a dearne barbel trotting worm last week, although due to the nature of
dearne barbel swims (they generally live in and around the snags) I find ledgering
with strong tackle a favourable aproach.
Good luck in your quest.