The team already knew that lemon and orange should naturally fall into the citrus family, jasmine should be floral and thyme herbaceous.

Dr Rodrigues then tested what the group calls its "perfumery radar" by presenting it with four essential scent oils: orange, lemon, jasmine and thyme.

Unlike its sweeter counterparts, which are grown around the globe, around 90% of the world's entire supply of bergamot comes from one small stretch of the Calabrian coast in the tip of Italy's toe.