Directly from their website:
"Does Toblerone contain Gluten?No. All Toblerone flavours do not contain any gluten ingredients."No mention of any factory cross contamination issues but if they just make Toblerone products and none of them contain gluten, well yay! Just be aware that these products aren't labelled 'gluten free' though.
By providing these lists I'm not to be blamed for any overindulgence, okay? :)