Thanks for posting this: it is (as attributed you intend) thought-provoking. What would be really interesting would be to know how much of this non-EU trade is attribute to EU negotiated agreement with 3rd party nations? It would also be (even more) interesting to know what future similar ones will contribute to our export trade and whether we might have to sacrifice these as we leave the EU. I'm not sure anyone has the data.
That’s a slighty suspicious looking graph. It’s implying that over the past 15 years every fluctuation in export to the EU is picked up by an export of exactly the same % value to non-EU? I don’t believe that.