Why does the gearbox squeak when you change gears on your 52 plate Vauxhall Corsa?

A squeaking noise when changing gears in your 52 plate Vauxhall Corsa could be due to several factors, such as worn or damaged gearbox components, inadequate lubrication, or a failing clutch. It may also indicate that the Transmission Fluid is low or contaminated, leading to increased friction. Additionally, issues with the linkage or synchronizers might contribute to the noise. It's advisable to have a mechanic inspect the gearbox to identify and address the underlying cause.