The banks say the trials last week point to benefits including reducing settlement risk and creating trading efficiencies, but they also highlighted new risks.
All the major banks have joined a new platform to sell term deposits to councils, universities and other investors in real-time and will pilot digital currency.
Over 100 countries exploring their own digital sovereign currencies daijiworld.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from daijiworld.com Daily Mail and Mail on Sunday newspapers.