Hello Dave, for Bream it has to be worms, for Roach maggot and caster. Irish Angling Services will provide you with all three but I like to take my own worms over (sometimes the IAS worms are a bit too big) and I get them from willy worms at www.willyworms.co.uk But don't forget you can't take them over in the soil provided so clean them off and put them in shredded damp newspaper with some mashed potato.
cheers,
Scales,
Every angler knows his Plaice.