Thanks for your
help. Yes my car is the pre facelift mk2 and after cutting the same small section away to accommodate the SDcard block at the bottom of the RCD510 head unit it fitted nicely . I had to connect power to the code pin and then as you say it was a plug and play. I’m not an expert on this but found the forum told me everything else I needed to know with a bit of searching.
Had to buy the double fakra adapter, a fakra DAB aerial, AUX connector, and a fascia panel end everything’s worked perfectly.