Reverse lights have stopped working - what can I do?

I have no reverse lights on my 2008 Citroen Xsara Picasso. I have checked the bulbs and the fuse. They are both fine. What else could it be?

My Scenic's interior light stayed one?

I left the Scenic and the interior light and boot light did not go off as they usually do. I checked the switch and could not switch it off at all. There was nothing wrong with any doors or door closing...

Did you know that the glovebox light can stay on and flatten a car's battery?

I note your advice to avoid flat batteries by switching off lights and removing the boot light bulb. It may be worth mentioning the bulb in the glove box, if there is one. In 2008, I had a flat battery...

Vauxhall Zafira (2005 - 2014)

Compact yet can house seven people. Rearmost seats fold into floor. More versatile mid-row seating than previous model. Excellent diesel auto.