It's a 2011 2.0HDi Expert DW10UTED4
The part is an accelerator pedal for the speed limiter option. 1601CH is the part listed in ServiceBox but normally it's a 10 digit part number listed on used parts. After a bit of searching around, I think the correct 10 digit code is 1401281180 but it would be good to know for certain.
Yep, that's the correct part, but too expensive for me, thanks for looking though. I thought it would be good to know how / where to look for the cross reference in general for the future as dealers & ServiceBox tend to use the short codes but used parts tend to be the longer 10 digit code and the parts themselves rarely seem to have the short code.
Ironically, in this case the cheapest part is new and using the short code 1601CH