Why did this light appear:

This light can appear if the handbrake is applied.It is a normal operating feature

What do I need to do?

When you release the handbrake the light should go out.If it does not, stop the vehicle and check the brake fluid level.If the brake fluid level is ok contact your breakdown assistance company.If the brake fluid need t be topped up, do so and check if the warning light goes out.If it does, you can continue driving.If not, contact your breakdown assistance company