Iron Maiden beer has sold 3.5 million pints

Iron Maiden have launched their own beer and named it after one of their most popular songs. Credit: APEGA/ABACA USA/Empics Entertainment

The Iron Maiden craft ale Trooper has sold 3.5 million pints - and its brewers claim its the most exported British ale - without a penny being spent on marketing.

In 2012, brewers Robinson’s teamed up with the heavy metal group to brew a beer named after one of the band’s best known songs.