Add all ingredients apart from Rum into a mixing glass, shake and strain into a highball. Add crushed ice and float Appleton's 12yo.
To make Honey - Ginger Syrup add half a cup of honey to a container with half a cup of boiling water, stir until consistent. Add about 1oz. of freshly peeled ginger and leave to cool for a few hours.
As far as I know I came up with this after looking at recipes for the Penicillin. Although, really its just a margarita with Honey-Ginger syrup in place of Triple Sec so I'm sure someone came up with it before me.