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Hey Bryce, Thanks so much for your reply it's much appreciated. I was starting to think down the same lines regarding domain authority, but thought maybe the two sites linking together so much would argue that it wouldn't have huge impact when you take into account the extra authority in France that a .fr site may hold. That's my dilemma! But I think you are right that taking everything into account, the subfolder option just takes the edge. Thanks again for taking the time to answer All the best Joe

Thanks Dirk - only just noticed you'd replied! I can't get the links to generate the mistake my end - they both are working fine. I still have the same 901 error showing in MOZ though. Strange! - could be something to do with a Bigcommerce bug?? More likely it's something I've done wrong!...