The standard numbered point system is attributed to Lancashire carpenter Brian Gamlin, who devised it in 1896 to penalise inaccuracy, though this is disputed. Many configurations have been used, varying by time and location. In particular, the Yorkshire and Manchester Log End boards differ from the standard board in that they have no triple, only double and bullseye. The Manchester board is smaller than the standard, with a playing area of only across, with double and bull areas measuring just . The London Fives board is another variation, with only 12 equal segments, with the doubles and trebles being a quarter of an inch (6.35 mm) wide.