Iron Maiden's own brand of beer has proved to be a huge success.
The Publican’s Morning Advertiser report that Robinsons' director of marketing David Bremner revealed the news at a beer summit on Wednesday.
Trooper went on sale last Spring, sold one million pints within eight weeks of launching and even featured as a guest ale at Parliament.
Bruce Dickinson said of its launch:
"I'm a lifelong fan of traditional English ale; I thought I'd died and gone to heaven when we were asked to create our own beer. I have to say that I was very nervous: Robinson's are the only people I have had to audition for in 30 years. Their magic has been to create the alchemical wedding of flavour and texture that is Trooper. I love it."