As a cautionary tale I share the sorry fact that I initially made this with Finnish Arctic Blue gin as we didn't have any London dry in the cupboard. I can attest that the recipe says "London dry" for a reason as Finnish Bilberries just do not marry well with Limoncello. On a happier note we have since made this with Tanqueray and what a difference that made! All up a nice riff on a dry Martini and something I will return to from time to time.