Also do these grey imports from france have the exynos or the Snapdragon 820 processor ?Just to make you all aware, there are many cheap S7 for £400 because they are grey imports, not EU models.
You can check this by checking the model numbers, non EU models they are selling are SM-G930FD, EU models are SM-G930F.
Not a problem as they all work fine in the UK but Samsung will not honour any warranty if it's a non EU model. Therefore you won't get 2 years Samsung manufacturers warranty.