Tanqueray London Dry Gin is 94.6 proof/47.3 abv. and has a nice juniper flavor with sharp hints of spice and citrus. When sipped straight it has a sprightly juniper bite on the tip of the tongue. Once watered down, more of the botanical flavors are released and you get the addition of many mild floral and citrus notes. Some of the botanicals used are Juniper, coriander, angelica, and my guess is some form of citrus. It is quadruple distilled, first in a continuous column still, and then a final time in a pot still.
Tanqueray is based on a 200 year old recipe and is the number one imported gin to the U.S. Supposedly the Tanqueray recipe has been carefully guarded since it was first made and there are only four people in the world today that can make Tanqueray. This gin is a genuine, classic gin that tastes like gin should.
Fun facts: The late Johnnie Johnson (known best as Chuck Berry's piano player) wrote a song named Tanqueray. It appears on the album Blue Hand Johnnie which was released in 1991. At Rhapsody you can hear the original and several other versions of Tanqueray, as well as other sings with the same name, which are all really, really great. Well, maybe not in the case of "interesting" song called Poon Tanqueray by Rapnexx.
Tanqueray No. Ten is bottled at 94.6 proof / 47.3 abv, and was first released in the year 2000. It already has a big fan base who have nicknamed it T-10. In some ways it is quite different from the norm in gin because it is made with whole, fresh picked fruit and botanicals, not dried. They include grapefruit, orange, lime, juniper, and chamomile among others. This is one of the new style gins that actually goes back to the genever roots where gin started, having big bold, sweet flavors. It is a heavy citrus and fruit forward gin with a bright aroma, and has a syrupy/glycerin consistency to it, making it feel very full and fat in your mouth. It's a gin with a lot of body to it. The T-10 flavors are very good, but I feel that the fruit and citrus overwhelm the juniper. I think gin must have juniper as at least a top note if not the main one. While at first I didn't care for it and was knocked back by the flavor and consistency, T-10 does grow on you, as long as you are not doing side by side taste tests with other gins. After a bit you don't notice the sweetness as much, and the thick body holds the aftertaste on your tongue quite well. Because of this it has a finish that lasts an extended period of time. 
