Weet Bix as a substitute to flaked wheat?

Hi all,
I have an all grain recipe which calls for 200g of flaked wheat. My LHBS is out of it so I raided the pantry and found some Weet Bix and was wondering about using that as a substitute.

The ingredients list wholegrain wheat 97%, raw sugar, salt and malt barley extract along with some vitamins. To my thinking this should be just like torrified wheat, though salt would be the main concern here. The nutrition information panel shows sodium at 270mg/100g so I'm looking at a total of 540mg

Total grain bill is 4.6kg comprising of pale ale (76%), wheat malt (17.5%), flaked wheat (4.3%) Munich 1 (2.2%).

Do you think Weet Bix would be OK as a substitute or would I be better just upping the wheat malt to 21.8% and forger about the flaked wheat. To be honest I'm not really sure what the flaked wheat adds to the recipe anyway.

Any thoughts would be appreciated,

Cheers.

Peter

G'day Gash, sorry for the slow reply.
It's a Pacific ale type pale ale. I have seen a few other recipes that just use wheat & pale malt so that might be the safest path.