As far as I'm aware chlorinated chicken has never been banned in Europe, it's an accepted practice, almost globally. The official EU position is that although chlorinated washing is acceptable and within food standards regs, they would prefer to see a practice where greater hygiene is achieved earlier in the breeding process so that chorine washing is not required. The chlorine levels used aren't that much higher than the amounts used to keep drinking water clean. The EU banned US chicken over animal welfare concerns, where the eu might have 80 birds in a pen the US might have 100 or some such.
Washing chickens in chlorine isn't actually deemed dangerous – it's what comes with it that's the problem
www.independent.co.uk
Canada which has high food standards imports chlorinated chicken. It's labelled as such and gives consumers more choice and control over cost, they can still buy un chlorinated and free range but gives them a cheaper option to the less well off.
The EU are well known for placing restrictions as above in the guise of a safety measure when it's quite clear they are being 'protectionist' to help their own farmers, which I don't entirely disagree with, I'd just like to see a little more honesty about it.
The Mercosur trade deal, almost there after 20 years is still being blocked by French farmers.