YAY managed to sort but just incase anyone else has this issue
weirdly the round control panel must have been wet in side - (we've been away for 3 weeks so slightly strange)
Anyway read on another forum the the control may be wet inside, we'd tried everything else so thought may as well try it...
We have been away and come back to find our shower isn't working
We have cleaned the filters and reset the electric power to the shower
BUT the control button is flashing red and doesnt go off
We have tried leaving it switched off for several days then switching it back on but still the red...