No Dashboard Display

So this has been happening for a while now. Electronically, my car works fine however when I start the engine, none of the dash display works; including warning lights, the speedometer, the backlight on the hazard warning button, the amount of miles I've done...

There is just no display on the front of my car. I've taken to using a sat nav to know my speed and the orange display to know how much petrol I have.

However the display isn't completely dead. Sometimes when I am indicating or have the hand brake on, I see the lights for them briefly flash up on the dashboard then go out again; so the problem seems intermittent but mostly, the dashboard is completely dead.

Any help would be completely appreciated! I've tried removing the dash and checking the connector behind it but it's all attached fine.

Thank you!