A bit more info about the high salt/sodium content of bread.

Warburtons warned over salty loaf
from an article in The Independent

Extract:

Salt in bread: How brands compare

Average salt content per 100g bread. Loaves surveyed October 2008. Recommended daily salt intake is 6g

Warburtons 1.08g

Hovis 1.07g

Asda 1.05g

Kingsmill 1.03g

Tesco 0.96g

Waitrose 0.94g

M&S 0.92g

Sainsbury 0.86g

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And see Sodium in foods