Well, I tried to fit this on Sunday, but the multi plugs are different - 12 pin not 14 like mine, though they look the same at a glance.
I have emailed the manufacturers, who now tell me that it only fits the US version, and they do not have a conversion loom.
They should make this clear on their site - Now I must try to get my money back.
They have responded quickly so far, so I hope there won't be any problems.