You've got to be kidding!
The tonic completely masks the taste of the gin.
Rotgut Gin and tonic would be preferrable. And taste just as well!
Save the Tanqueray for an extra dry martini, shaken not stirred!
From the h2g2 website:
Has a gin and tonic ever saved you from one of those close afternoons that clings wherever you hide, refreshing your muggy brain from the inside? If it has, you will understand the appeal of this grand old drink to cricket players, especially those who have ventured onto the sub-continent's parched ovals, and may find points of interest in the words that follow. If, however, your preference is for the sticky charms of rum and coke or similar commercial inventions, this entry may be too austere for you.
Aspersions have been cast upon gin ever since the secret of its inexpensive manufacture became known in Britain about 200 years ago, advancing its popularity with the lower classes and simultaneously drawing moral indignation from their social superiors. Being blind on expensive claret and brandy was apparently a more civilised inebriation in Georgian London than to be drunk on gin, giving rise to a number of derogatory gin-isms that continue to undermine the true nature of this brave spirit.
The best-known survivor among these is 'mother's ruin', a term that came from British soldiers' taste for gin while on leave, and the maternal state this induced in those women who shared their off-duty conviviality. Yet from these rather shabby origins has come one of civilisation's finest creations, a drink that could just be the best cooler ever - gin and tonic.
British Tommies' love of gin made it the perfect antidote to the bitter-tasting extract from the bark of the Cinchona calisaya tree, which was added to their drinking water by command. Known as quinine, this extract was the only remedy known to moderate malaria, a substantial problem for European troops stationed in India.
But, although its inclusion in the soldiers' drinking water significantly reduced the incidence of malaria, the bitter taste of quinine made the water almost undrinkable; unless, that is, it was accompanied by a large shot of gin. Hey presto! The gin and tonic. It is debated whether the final twist of lemon or lime is a military attempt to foil scurvy or the inspired invention of an unknown imbiber, but its added zest is essential to the thrust of a good G and T.
If I couldn't taste the Tanqueray, why would I specify it? To each his own, I guess. ;)