The bread needs to be presented fluffy, so the way to do it is to take a small piece of bread, about the size of a 10p piece, and fold it around a size 8 hook, squeezing it just at the eye of the hook and hiding the hook.
Because the bread contains a lot of air, if you want it to sink, dip it into the water, lift it out, and very gently squeeze it, just enough to squeeze out some water.
Trim the bait so that a mullet can't get hold of the edge and swim off without taking the bait into its mouth so easily.
Now it should sink.
The bait will stay on the hook surprisingly well, and you'll find you will catch more species than mullet!
Have a look at
Mullet FAQs for more information about mullet and how to catch them.
Tight Lines - leon