Responding to the switch in approach to the contact-tracing app the chief executive of NHS Providers, Chris Hopson, said:

"It is disappointing to hear about the problems encountered with the contact tracing app.

"Of course developing this app is a huge technological challenge, and it makes sense to change course when the evidence shows that is the best approach.

"But this is a setback in delivering a world-beating test and trace system, in which an effective app would play a valuable role.

"We have to hope the new approach will make quick progress.

"This episode presents yet another example of the dangers of over-promising and underdelivering."

On the latest test and trace statistics, Chris Hopson said:

"These test and trace figures reflect steady progress.

"While this is encouraging to see, it would be helpful to know how many of these contacts are being traced through the national programme rather than through local initiatives.

"What is clear is that we still have a long way to go before we have a fit for purpose national test and trace operation.

"The concerns about local outbreaks in China are a powerful reminder of the importance of ensuring we get this system fully up and running as soon as possible to prevent a potential second wave."