This latest advertisement campaign from Nestle's Kit Kat, has commuters at the London's Victoria Train Station, grinning from ear-to-ear.

Instead of scrambling to put in the right code and then be served by an uncaring robot arm, customers are given their candy by a chatty, ever-smiling human, stationed inside.

The only drawback? The selection is a little limited - But judging from the smiles, customers don't seem to care!