On Sat, 18 Jun 2016 15:42:16 +0100, Andrew wrote:

Let's say that the UK wanted to put a 20% duty on steel imported from
China.

But Germany didn't. But we can import steel from Germany without any
duty.

Bad argument. The EU wanted to impose restrictions on Chinese steel,
but Cameron persuaded them to water their proposals down, presumably
because he wanted to kow-tow to the Chinese.

sigh Widgets, then. The product is irrelevant to the explanation.