There are urine deflectors https://en.m.wikipedia.org/wiki/Urine_deflector all over Europe. Norwich in particular has a lot of them.
I'd rather effort was put into providing public toilets and urinals - public urination is the symptom of not enough facilities.
I was recently in Amsterdam (you know, the place where they said "welp we'll never fully outlaw prostitution & drugs so let's allow but regulate") and appreciated a series of very public urinals. Which I assume follows the same logic "people are going to pee on the street no matter what, let's give them a place to help control it" - I quite like the idea that acknowledging certain human traits are essentially a force of nature, so why not redirect that firehose towards a more tasteful target than impossibly try to stop it.