You're the lucky one, I have to park in X, which is way further up the road, and thats after playing chicken with the Vigin crew bus cos I can't drive over those flaming speed bumps any less than 5 mph, even though its a 30 mph road.
You'll have to check the timings with respect to North Terminal bus, but us Southerners have a reliable service. It leaves every 10 mins throughout the day/night. During COLD brrrrr mornings I stay in car until its approaches the next 10th minute and I don't have to run. I think North Bus runs 5 mins after South, like I said double check.
Welcome to the rat run