I can see a pile of UK business moving offices at least to the likes of Dublin, with just 12.5% corporation tax an added advantage. Might be some other odd moves - say Latvia or Lithuania, again, very low corporation tax, low labour rates for an MRO operation too, indeed any staff. Aircraft will be placed on EU flags of convenience, the UK CAA will have little to do anymore as all the AOC operations will be out of their jurisdiction....