Depending on how you view this, it's a traditional Gin & Tonic with a splash of bitter liqueur adding colour and herbal fruity complexity. Or a G&T take...
I don't particularly like London dry gin, or Campari, or tonic. But this is somehow a very well balanced drink with only a subtle bitterness; and I like it, more than a little. Made with Gordon's London Dry, Campari (28.5%) and Fever Tree Premium Indian. What is balancing out the bitterness?