Does anyone know if it's STL100-2 for sure? I'm aware they market STL100-2 in the UK but there is no word regarding network bands or processor on Amazon.
Also of note; depending on who the amazon market place seller is, or where amazon is sourcing it from; EU devices may get sold to you. (this happens a lot, at the carphonewarehouse - most usually german imports).
I believe the only real concern is the stl100-1 - that doesn't use a qualcomm processor. Otherwise, most should work in the uk - though you won't get lte.
But, generally, I'm sure the uk model is the stl100-3.