"We would not commit the time to the consultation if we
didn't think we are getting closer, we are not there today, but
we are getting closer to the point that if becomes a when and
not and if," Griffith told an event held by OMFIF think tank.
Britain must not be left behind global innovation in payments with non-cash forms of payments already accounting for 85% of payments and still growing, Griffith said.
Many countries are preparing the ground for a digital version of their currencies, with the
European Union due shortly to publish a draft law that would give a legal basis for a digital euro, if one was introduced.
"We envisage a digital pound acting in a similar way to a physical pound, it will be a safe, trusted form of money," Griffith said.
However, fiat-backed wholesale digital currencies would be launched before any digital pound, regulated by rules now being approved in parliament, Griffith said.
(Reporting by Huw Jones, Editing by Louise Heavens)