To see whether it would work from a flavour comparability perspective, we experimented by using Empress Elderflower Rose Gin and were happy with the outcome.
When we (there were two of us) compared against the original recipe, the original is truer to the taste profile of a Last Word. There’s a subtle, but notable, difference with the gin we used (a bit more layered and interesting, flavour-wise). When the votes were tallied, the Empress variation came out victorious.