Over the years I've used minnows (both live and dead) and caught Barbel from the Kennet at the start of the season. Ive also used peeled prawns, cheese, different pastes (cheese, bread and fish meal pastes), sweetcorn, boilies, pellets, worms, maggots, caster, hempseed and even floating bread one warm night when the barbel were turning upside down taking food from the undersides of streamer weed; plus luncheonmeat and sausages and swan mussels and there are probably one or two others that I can't remember.
Some baits have been more successful than others at certain times of the season and some baits worked well on one river but were virtually ignored on other rivers.
I don't think that there are many baits that haven't already been tried for Barbel by someone out there; I certainly don't see anyone coming up with a new magic bait that works on all rivers and streams throughout the year.
Keith
I've also done the very same as you above Keith,i'm finding myself pellets and boilies are becoming difficult to catch on my rivers,as populations dwindle,it means a little or no feed scenario,with only one or two casts before spooking,with small fish populations growing small or soft baits are mullered instantly in warmer months,maggot and caster are all about creating competition,which doesn't occur with one or two fish,it's a pick and choose life these days,on the D.Stour baits of less than 10mm are roach fodder,very difficult future imo,unless you live on the Trent or Wye...