Undo the four screws which hold the oven in its housing

You'll need a flat blade screw driver.

Pop out the six timer buttons

They are quite hard to pop out. Put the flat bladed screw driver under the right hand side and twist gently clockwise. On the 12 of December 2021 I put a little oil on them in the hope that it'll make it easier. Let's hope that it doesn't congeal and make it harder.

Undo the oven panel screws

You'll need a very short cross-head screw driver for this.

Pop the oven control knobs out to support the panel as you release it. The screw on the left is easy; do it first then you'll know what to expect on the right which you can't see. Slide the panel off from the control knobs.

Replace the light tube

Twist the tube in its contacts; the top towards you. Then slide the tube forwards from its housing. Here's the one you want from Amazon.

Put it all back together

With the oven control knobs popped out slide the panel over them and put the left hand screw in first. Then, with someone pressing the panel in place, very carefully put the screw in its counter sink hole then holding it very carefully engage the short screw driver without letting go of the screw. Then crawl around the floor trying to find the screw which will have escaped. Repeat until your luck gets the job done.

Slide the oven back into its housing and replace the four flat head screws.

Pop the six timer buttons back.

Switch back on and set the clock:

• Press and hold the left hand two timer buttons (Minute Minder and Cook Period)
• Then press the + or - buttons, on the right, to adjust the clock.