This is quite a worrying story, especially if you use any of the 79 NHS apps, such as stop smoking, lose weight etc.
According to a story on the beeb:
"Of the total, 70 sent personal data to associated online services and 23 did so without encrypting it.
The study found that four apps sent both personal and health data without protecting it from potential eavesdropping."
BBC - NHS-approved apps found 'leaking' ID data
It seems our data isn't safe anywhere these days, form mobile phone companies flogging your data and now poor security from organisations that should know better