How do you change heater illumination panel light on T reg Corsa?

Difficult to write this one up.There is only one bulb in the back of the heater assembly,and a light transmitting panel distributes the light. You have to remove the centre mixed air ducts,the heater switch and slide knobs have to be eased off.There is four bolts holding the assembly in,once it is out,the bulbholder is easy to remove and replace bulb.Just take care with the plastic parts.