Following a saga which has previously been posted and a gap of 12 months since recovering the front seats my car now matches perfectly.
I also fixed another rattle as searching through the EPC I came upon the diagram for the Electric Rear seat and found mine was missing four plastic "sliding jaws" part no 115 780 00 83 - which are fortunately the same as used in the sunroof and easily available.
Anyway here is the picture and I am mighty pleased with the result - I hope this leather lasts...