Lord Invader was the stage name of Rupert Grant (pictured) who was a Calypso star in Trinidad and wrote the lyrics to Rum & Coca Cola which became a massive hot in 1945 for The Andrews Sisters.
To make the cola syrup boil the following for 20 minutes
400g white sugar
30g dark muscovado sugar
Zest of a lime, a lemon and an orange
1tsp coriander seeds
1tsp grated ginger
1/2tsp citric acid crystals
1.5oz Green Island light rum
1oz Wray & Nephew overproof white rum
0.75oz lime juice
0.5oz cola syrup
Shake hard until your hands shiver. Strain and adorn the glass with a peel & flesh disk of lime.