On some of the food shows - DDD for example - I see all manner of sandwiches piled with fries (chips) - including fish sandwiches. Just did not know what they were called across the pond. I have put store bought potato chips (crisps) on a sandwich.
I don't find it particularly smelly, but then again I don't think gruyere is smelly and some do apparently. It has an orangish color rind.