Maybe because you can't really get your foot between the wires
If you twist your foot sideways, you can gain some leverage. That said, going under it, or between the fencing is always easier. Climbing it may cause it to collapse. It's hardly sturdy.
Yeah, that sounds like an awesome way to break your ankle!
Do they not use this stuff over there? Have a look around when you are travelling. It could be.., they have just conned the UK buyers.
They have fencing, but I don't think it looks like that. I could be wrong. It isn't that often that I got poking around construction sites! :)