America insists Europeans are not aligned to the science which proves there is absolutely no risk to consuming genetically-modified food.

But that single emotive issue could potentially bring down the €4 trillion (£3.1 trillion) Transatlantic Trade and Investment Partnership (TTIP).

Europe, though, is standing firm on this hugely controversial chapter of the free trade deal, and that in turn may scupper the stated ambition of both camps to have a sign-off on TTIP by the end of this year.