What are the most common electrical issues in a Vauxhall Insignia?

I have been having trouble with the electrical system in my Vauxhall Insignia. The lights flicker and sometimes the car won't start. What could be causing these issues and how can I fix them?

One possible cause of these electrical issues could be a faulty alternator. It is responsible for charging the car's battery and if it is not working properly, it could result in the symptoms you are experiencing.

Another common issue with the electrical system in the Vauxhall Insignia is a faulty ignition switch. This can cause the car to not start or to randomly shut off while driving.

It is also worth checking the battery connections and ensuring that they are tight. Loose connections can cause similar issues and can easily be fixed by tightening them.