Steven Green: The idea of "shared policy challenges" is underpinned by the fairy tale UK tells itself about sovereign equality. Relations with a weak state on the margins of Europe have marginal benefits to EU. If UK wants serious attention from the EU it needs to offer substantial concessions. Not red lines.

The idea of "shared policy challenges" is underpinned by the fairy tale UK tells itself about sovereign equality. Relations with a weak state on the margins of Europe have marginal benefits to EU. If UK wants serious attention from the EU it needs to offer substantial concessions. Not red lines.