I emails SEAT UK over the weekend about Full Link and got this reply:
Many thanks for contacting SEAT UK Customer Services regarding the Full Link option on your SEAT Leon Cupra
280.
I can confirm that this is a factory fitted option only. Full Link cannot be retro fitted to the vehicle once it leaves the SEAT Factory.
I understand this is not the news you wanted to hear and I apologise for any disappointment this may cause.
If you wish to discuss this further, please contact me using the details below.
Once again, thank you for contacting SEAT UK.
Kind regards
Sorry if I'm returning to old ground and just confirming what everyone already knows!