The gray vs grey debate has tempted me to become a drinker. Unfortunately, I cannot afford alcoholism on my current budget. It will have to wait.
But seriously...
So there seems to be some leniency in regards to using US spelling in UK books because Oxford includes the options to use both variables.
Interesting. I'm sure in a few years I'll have this all figured out and formulated. Or, I will have started writing in my native German language (which would surely be a headache unto itself).