Bitcoin has gained a huge amount of attention over the last 12 months, and now developers are keen to capitalise, by bringing the virtual currency into the offline world.

With HMRC thought to soon be changing the way it classifies cryptocurrencies, and London set to see its first bitcoin ATMs this month, we spoke to Sam Cox, a 24-year-old product designer who has created BitTag, a price tag which displays a live bitcoin conversion from any local currency.