A decade ago, no-one had heard of Twinkl. Fast forward ten years, and if you still haven't then you must have been hiding somewhere.

Twinkl is one of the city's biggest employers along with millions of users right around the world.

But what do they do, and how have they got so big so quickly? James met up with chief product officer Helen Fulson and chief operating officer David Angrave to find out.

Steel City Business is the Sheffield Business podcast, highlighting the great stuff happening within the business community here in Sheffield.