Thought I'd update this for those who have the mouldy bonnet liner issue, I spoke with the manager at the dealers I took my car too and he wasn't aware of the "fix" show I showed him the TPI that I had which details the need to replace the liner and put the foam in to prevent the ingress of water in the future.
They searched the system and spoke with Seat directly but came back with nothing, there was no record of this fix on the system so it seems that Seat have pulled this and no longer do it, it could be that it wasn't actually a proper fix for the issue so they have removed it, just waiting for word back from the dealers to see how they will proceed with this, I'll update when I know more.
Also the creaky seat back will get looked at when it goes back in for the bonnet liner work doing, as they've never had an R in the workshop before they are wanting to make certain they have all the details on
how to remove the seat backs before they start the work, they don't want to tackle the work without being sure on
how to do it just in case they damage something, which is fair enough.