Tanqueray is named after its founder, Charles Tanqueray, who established the brand in 1830. Originally distilled in London, it has been distilled in Fife, Scotland since 1998 at the Cameronbridge Distillery. Their neutral grain spirit (wheat based) is actually made in house and not purchased, the latter of which is more common practice in gin production. The four known botanicals for the gin are juniper, angelica root, coriander seed, and licorice root. This is distilled in a one-shot method as opposed to making a gin concentrate which needs to have neutral spirit and water added to dilute. Here, they just add enough water to bring down to proof which varies dependent on where it is sold.
Neutral spirit flavored with juniper and other botanicals. In the US, the minimum ABV is 40%; In the EU, it is 37.5%. Originally, only made in London, this can be made anywhere. No artificial flavors or colors can be added. Only water, neutral grain spirit, and sugar (no more than 0.1g/l) can be added.