The one you have is the same as the one I purchased on its own and the same in layout (excepting help, fn and delete) the the keyboards which came with all the older macs in my house. You get used to the @ positioning - it's not a problem switching from PC to Mac after a while. I'm not sure why the layouts differ but I wouldn't be too annoyed with it.
Oh, and those images must be from somewhere else, no UK keyboard would have a return key like that, surely?!