How do you drain coolant from w-reg corsa?

To drain coolant from a W-reg Vauxhall Corsa, first ensure the engine is cool and then locate the radiator drain plug, typically found at the bottom of the radiator. Place a container underneath to catch the coolant, then open the drain plug and allow the coolant to flow out completely. Additionally, you may also remove the expansion tank cap to facilitate the draining process. Once drained, close the drain plug, refill with new coolant, and check for any leaks.