Bread can be a healthy extra B-choice.
You can have two slices of a 400g wholemeal loaf as one HE-B, giving you up to 4 slices of bread a day if you want it. You need to make sure it's the small size 400g loaf though, not just a normal sized loaf in half the amount, if you see what I mean? I usually use Hovis or Warburtons.
If you want to use your HEBs for something else, then you will need to use syns on the bread.
Bread isn't a great food for a lot of people, hence why it's restricted. Over-eating, bloating, etc.
The fibre is good for you, which is why brown bread is a healthy extra, as it's higher in fibre.
Hope that helps?
Hellie