Fuel & Temp Gauge Madness

Recently my Fuel and Temp Gauges have both decided to stop working correctly. The Temp gauge goes all the way to the right and Fuel just goes where it pleases. They are standard gauges and senders and my dash has not been messed with at all.

Any ideas how I can rectify this? I've had a look under the dash but can't see anything for the column etc.

Thanks