A bit low, wouldn't you say, making threats regarding security? Why should failure to reach a trade agreement weaken our cooperation in security issues?
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If the EU deliberately sets out to damage the UK, with the view to discouraging other EU member states from leaving the organisation, there will be bad feeling and I would expect the UK generally to gravitate towards to the US, including re-security, reducing cooperation with the EU. Fact of life, Mr Junckers might care to remember.