Mark Carney, Governor of Bank of England, offers his perspective on the protectionist threat:
https://www.bankofengland.co.uk/-/media/boe/files/speech/2018/from-protectionism-to-prosperity-speech-by-mark-carney.pdf
https://www.bankofengland.co.uk/-/media/boe/files/speech/2018/from-protectionism-to-prosperity-speech-by-mark-carney.pdf