Does it have double-quote on Shift+2, etc.? I can only find pictures of what look like US mac keyboards.
Here's a full-sized (wired) UK Mac keyboard. Open the image in a new tab or window to see the full size (~900 pixels wide)

The PgUp cluster is correct and it still has an extra key between the left shift and z, though different glyphs. There are also a number of other changes making this distinctly different than the previously posted UK keyboard.
BTW, what are the symbols on the key below the ESC used for?