John Lobb Ltd v John Lobb SAS: a disconcerting attempt to void a contract for common mistake

I was always intrigued by the way John Lobb, the superb footwear brand, managed its affairs between Paris, France, and London, United Kingdom. Well, now, I know, thanks to my exhaustive review and analysis of the England and Wales High Court (Chancery division) decision dated 8 September 2022, on whether the agreement bounding the French business, John Lobb SAS, to the British business, John Lobb Limited, was void under the case law of common mistake. Was it a good call for John Lobb Ltd to pull such a claim? Did John Lobb Ltd gain anything out of this public exposure, and this washing of dirty laundry in the public eye? I don't think so and here is why.