The UK would be IMPORTING goods from the US.. I don't get where you're getting this idea we'd be exporting cheap goods from the UK to the US. The examples i explicitly stated were things like education, specialized tech (which would be fine for shipping), and access to financial services, which once again doesn't need shipping. For the last time, i'm not saying that the UK is going suddenly start mass producing cheap goods to export to the US? I dont know where you've got that idea from. The US, however, does create a lot of cheap goods which they'd be exporting TO the UK, such as your corn, meats, etc.

The main issue people are concerned about is that the UK would be flooded with cheaper/sub standard goods (re. chlorinated chicken) that they can't differentiate between standard UK/EU products which are of a higher quality. Currently, US meat is outright banned in the EU, if there's an influx in cheap/chemically altered meats coming from the US which people can't differentiate from (this is partially due to the terms of the trading deal banning branding of goods as "Produced in the UK") then people are worried they'd accidentally end up buying them.