i often do 2 slices of a wholemeal 800g loaf and add the calories together (so for this it would be 170 calories). i remove 130 cals for a healthy extra portion (hence 40 cals left). This would be then 1 HEB + 2 syns based on 20 cals = 1 syn. I only do this on wholemeal bread tho, you cant on white/
Yes its a tweek but its one I have done since following slimming world and never had it effect my weight loss. The cost of buying the skinny slices of bread or a 400g loaf is often more than an 800g one anyway (and my husband if in a bread mood will moan a lot).