David Davis has thrown a spanner into May’s Brexit plans | Simon Jenkins

Common sense says the UK needs workable trade arrangements with the EU – but the PM still faces a battle

No sooner does Theresa May win her cabinet critics over to her Brexit compromise than David Davis rains on her parade. Her chief Brexit negotiator has had enough. His resignation letter suggests a long-disaffected colleague, sidelined from negotiations and fed up with being the butt of feuds. Quite what he wanted from his job that was remotely achievable remains obscure. Now he is yesterday...