Pale milds tend to have a lighter, more fruity aroma with gentle hoppiness.
Dark milds may have a light roast malt or caramel character in aroma and taste.
Scottish cask beers may have mild characteristics with a dominance of sweetness, smooth body and light bitterness.
Original gravity: less than 1043
Typical alcohol by volume: less than 4.3%
Final gravity 1004 - 1010
Bitterness 14 - 28 EBU
(courtesy of http://www.camra.org.uk/mild)