" but the point about not being able to drop tariffs on produce from one country without dropping them for all, is refuted by IEA "
The IEA have that wrong. If we were to offer one country 0 tariffs through MFN status, we;'d have to open it to them all, that's the way MFN status works.
This article: beefandlambmatters.blogspot.com/2013/07/why-uk-imports-lamb-from-new-zealand.html
Doesn't seem to say what you think it did. We export most of our lamb because it contains products the UK doesn't eat.
"So far in 2013, the UK is the second largest importer of sheep meat in the world, while holding its position as the third largest exporter globally. However, if it weren’t for imported product, we would likely see a decline in domestic consumption, rather than a large scale switch into domestic product due to surplus sheep meat being the wrong type of product, lack of availability at the right time and being priced above the reach of some consumers."
So basically when we export most of our lamb to the EU, tariff free, tariffs will cause the number of exports to fall.
The point about importing food from Africa? Ok if we are going to lower standards etc too, but also see the UK agriculture industry colapse ( as first predicted by Minford).
Essentially the IEA and Minford models make a few assumptions.
1., They assume perfect competition, where price is the only determinant of demand. Perfectly competitive markets don't exist ( products are not homogeneous) and price is not the only important determinant of demand, even for agricultural produce.
Thus I found this odd:" found this an odd example given the number of UK cars imported from Germany" the most important determinant of demand for cars is not price. WTO terms would see the death of the UK car manufacturing industry, which would of course reduce consumer choice here. Employing WTO terms on cars would mean all of them increase in cost ( including the Korean cars where the tariff is not WTO standard). However, people will still be purchasing BMWs, Audi and VW cars over others ( but remember that the majority of US brand cars in the UK are produced in the EU).
The rest of