Iron Maiden’s Trooper ale has proved so successful that the makers are having to work overtime – before it’s even gone on sale.

But frontman Bruce Dickinson admits it wasn’t just a case of adding the band’s name to a bottle, and they actually had to audition for brewers Robinsons.

The award-winning firm tied in with Maiden to create a "secret squirrel" recipe. Interest has been so strong that they’ve moved to a six-day week to keep up with advance orders, with over 100 countries having expressed an interest in stocking it.

Dickinson describes Trooper as "a great drink to have on a summer afternoon. It’s 4.8% so it’s got a bit of a kick, but it’s still a good session beer. I wanted to make sure it was subtle enough so you could enjoy it for a while."

More than 250,000 pints of Trooper have been ordered in advance of its launch on May 9.

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