Why is my Vauxhall Corsa's engine making a loud ticking noise?

I've noticed that my Vauxhall Corsa's engine is making a loud ticking noise while idling. It's never done this before. What could be causing this and how can I fix it?

A ticking noise in the engine could be a sign of low oil levels. Check your oil level and add more if needed.

It could also be caused by a faulty lifter or valve. It's best to take your car to a mechanic for a thorough inspection and repair.

In some cases, a ticking noise could be a normal sound for your specific engine. However, if it's louder than usual, it's best to have it checked out.