An essay on the basic argument for trade, at Mises. But the author does admit a problem with externalised costs that aren't taken into account.
A thought: what if we in the UK really don't have much of a comparative advantage in any area, long-term? Once the East has caught up on skills, what do we have that anyone will want to buy?
And what about the monetary distortions in the market? It's like Monopoly with some players cheating by using secret stashes of extra banknotes.
Are the economists misled by an idealised picture of economics?