Nestle inform me that Sticky Toffee Aero and Tiramisu Kitkat Editions have ceased production because of low sales and high production costs. I doubt anyone on here shall miss them, but personally these were two of my favourite new Nestle products of the last few years.
It just goes to show that all that really matters is what the masses like, and if you fall outside of this bracket, stuff you.
If anyone is a fan of Caramac Kitkats however, these are still being produced.