There's always been a debate about the syn value of the potato crisps and lasagne crisps, but I'm not sure about other veggies.
The reason we had from head office was that although they were free foods the amount you could eat as crisps is far more than you'd eat if you were eating spuds or lasagne sheets as part of a meal. I'm sure that, if you're like me, you could probably go through a good few pounds of spuds as crisps, whereas you wouldn't eat that much in a meal.
it's worth checking with your consultant if you can before you start plowing through what you think is free foods.