Interestingly looking at that, it's a 200 as given away by the wing tip fences so unlikely to be part of the test program, but none of Caledonians A320s carried F-WWDA as a test registration.

Can see all the regs here - A320 G-BRSI Retires
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Edit - Turns out if was a test aircraft, MSN002, it carried British Caledonian on one side and Air France livery on the other. Was eventually delivered to AF.