Ha, only just got the spoiler!
I had a chat about the current rear spoiler with the insurer (who insured me on my last car as totally standard) and they said I had to check it was a standard one as otherwise it may invalidate the insurance!
Its a shame but gives me time to decide if I want a bodykit too and if so, get them all sprayed together.
I am sure if I had declared a different spoiler at renewal time it would have made no difference but mid term its a different story!