My Health app isn't working - please help!

Hi all,

The Health app is driving me mad!

when I open the app, 3 dashboards are displayed (steps, walking and running distance, flights climbed) which all show "No Data". I've tried turning different dashboards on and off but these don't stay on after the app is closed, the 3 above are there when I open it again. I can't add data manually either.

I have a couple of apps that have synced with Health but they seem to be struggling to connect (Patient Access and Sleep Cycle) now. I can't remember where I saw this now but I found a screen that suggested that the last time Health recorded any data was April 2015.

Health is switched on in Privacy -> Motion & Fitness

I don't know what else to try!

All suggestions welcomed!

Nik