For a safari-style sundowner, use a double measure of Musgrave Gin (which has notes of cardamom and ginger) with Fevertree Tonic. Schweppe's is also great, but Hill likes Fevertree's lower sugar content, which gives your drink "a bit more pizazz." Add a few fresh squeezes of lime, some sage leaves, and a few grinds of ginger.
For Hill's signature G&T, go with a double measure of Tanqueray London Dry (Mother's Ruin's standard gin), two slices of grapefruit (lightly muddled), and Fevertree elderflower tonic.
Add sunset, obviously.