Corsair calls it European (EU). It's most definitely not the UK layout, the symbols are arranged differently (at least @ " ~ # and £ are). It's identical to the US layout apart from being ISO, so it has one more key and differently shaped enter and left shift. In linux the additional key is set up automatically as '<>' despite having '\|' printed on it.
It is a particularly useful layout as I'm not a native English speaker and I switch between the US and my regional layout pretty often. Having one more key means I can directly map the keyboard to any international one without issues.
EDIT: I realized that the picture I linked before didn't have all the symbols on the keys. Not finding any other picture online, I took a photo of my own keyboard: https://www.dropbox.com/s/wancsvocepbmzmi/IMG_20150814_195207.jpg?dl=0
On a different note, can I ask for one more feature (I know I'm annoying you, sorry). It's fairly minor, but would it be possible to set the application to open directly as a tray icon rather than a full window? Right now when I log in the window always opens by itself (which is good as I want the program to run, just I don't need to see it at every boot).