Is it a spaceship? Is it a weapon? Is it... a tap?

After years of visiting many public bathrooms in health centres, hospitals, courts, schools and other such places, I thought nothing I find in a public bathroom could surprise me. Well, I was wrong, I spent a good long while staring at this tap. It looks like something that belongs on a space ship!

I'm guessing the NHS public toilets department still had a lot of money left in their budget by the end of tax year and had to spend it, quickly...