BJCP 11A
A light-flavored, malt-accented beer that is readily suited to drinking in quantity. Refreshing, yet flavorful. Some versions may seem like lower gravity brown porters.
Most are low-gravity session beers in the range 3.1-3.8%, although some versions may be made in the stronger (4%+) range for export, festivals, seasonal and/or special occasions. Generally served on cask; session-strength bottled versions don't often travel well. A wide range of interpretations are possible.
Moorhouse Black Cat, Gale's Festival Mild, Theakston Traditional Mild, Highgate Mild, Sainsbury Mild, Brain's Dark, Banks's Mild, Coach House Gunpowder Strong Mild, Woodforde's Mardler's Mild, Greene King XX Mild, Motor City Brewing Ghettoblaster
You can view the complete style details on the BJCP website. The 2008 style guide is obsolete but there is a similar 2015 style that you can view below...
OG: 1.030-1.038
FG: 1.008-1.013
IBU: 10-25
SRM: 12.0-25.0
ABV: 2.8-4.5%