A lot of international trade is other goods. Think of how much the UK has paid for things like American aircraft, ships, machinery, or materials used in manufacturing. Our armed forces use a lot of American stuff, and often even British made things have American parts (and a lot of it is covered by ITAR, to an even greater extent than the rest of Europe).
People also tend to hugely underestimate the amount of British manufacturing for the same reason, and because of lot of it is Foreign branded (e.g. Nissan cars).
Not American ones I don't.
Is Trump suggesting tariffs on incredibly over-priced and under-performing military and civil aircraft, when we can buy from Europe, or make our own?
To me it seems that the only things the USA sells us are horrible foods, and crap cars for fat people.