The Rootstock Trading Company, the Sheffield-based pub and music events operator, is looking to secure sites for its food concept the Twisted Burger Company.

The company, which is led by David Healy, will launch a new residency for the concept at the Aire bar in The Calls, Leeds, this April, but it hopes to have “put down roots in least another two cities” before Christmas.

The group launched the burger concept in the Harley pub and live venue in Sheffield in 2011 and it has since appeared at a number of festivals.

Rootstock also runs Tramlines Festival and the Sheffield-based bar, the Wick at Both Ends.