"While significant progress has been made, there is more to be done to deliver the full benefits of open banking within retail banking markets, and beyond," the statement said.
The recommendations from regulators will keep up momentum in open banking and extend its benefits to other sectors, said Marion King, chair of Open Banking Limited, which checks on whether the nine banks comply with open banking rules on customer data.
Britain is keen to push open banking to the next stage following Brexit to attract more fintechs to set up in Britain as the European Union is poised to compete with its own version of open banking.
The data protection draft law, now going through parliament, will be used to put open banking on a sustainable footing, Griffith said.
"We now need to see proportionate regulation," said Janine Hirt, CEO of Innovate Finance, the UK fintech industry body.