How about "micturating"? LOL
micturating - definition of micturating by the Free Online Dictionary, Thesaurus and Encyclopedia.
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I'd guess your circadian rhythms are off, if you're waking up to do it.
Why you do it too much in general, though ...
I guess it's possible that your very high protein intake is a factor. You were going to take protein powder to Ireland, on the assumption that there isn't enough protein in that island, weren't you? Reminds me of the old Dean Martin joke: they said, "Drink Canada Dry," to him, so he went there and tried do it. (Pardon me for pulling your leg, but you don't seem to mind a joke, so I thought I would.)
I could imagine that your kidneys would need to eliminate quite a lot of waste nitrogenous material, and maybe that would make you go more often.
But that wouldn't explain why you have a life-long propensity.
You could try cutting to back to something more like 100 to 120 grammes of protein per day, which is ample and still likely more than you need, and make that from real food sources (i.e. not powders), and see if that makes a difference.