US, British, or International English?

I live in the UK and wish to buy the wired keyboard so that I can use the numeric keypad with the Sibelius music program. I want the same layout as on the wireless keyboard that came with my 21.5" early-2011 iMac, but I am not sure whether this is the US English, British English, or International English version. Can anyone help?

Apple Keyboard with Numeric Keypad

Apple Keyboard with Numeric Keypad

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