When were the first mars bars made and by who?

http://en.wikipedia.org/wiki/Mars_Bar The Mars Bar is a chocolate bar manufactured by Mars Incorporated. It was first manufactured in Slough in the United Kingdom in 1932 as a sweeter version of the American Milky Way bar which Mars, Inc. produced in the USA (not to be confused with the European version of the Milky Way, which is a different confection). A different chocolate bar with the same name was sold in the USA until 2002 when its name was changed to Snickers Almond Bar (see Snickers). It contained then, and still does, plain nougat, almonds, caramel and Milk Chocolate. they are 2 miles long and half a mile tall