I get up early and like to listen to Farming Today on the radio (really interesting and informative about far more than just farming technicalities). This morning they interviewed Ian Wright, the director mentioned above. He was definite that leaving the EU without a deal would be devastating for both imports and exports. It would result in total logjams at ports, with just in time deliveries held up for considerable periods of time, and would impact very seriously on food availability in shops. This is all based on the government's own technical notices published recently. Here's a link to the programme (hope it works as they had an error message up earlier):
www.bbc.co.uk/programmes/b006qj8q
And here is a link to the Food and Drink Federation's statement on their website:
www.fdf.org.uk/news.aspx?article=8062
What worries me most is that this doesn't seem to be properly reported on mainstream BBC programmes or in much of the print and broadcast media.