http://www.ft.com/cms/s/2/3748166e-3151-11e6-ad39-3fee5ffe5b5b.html
"Boris Johnson, the former mayor of London with one eye on Mr Cameron’s job, invokes a newfound freedom without the pettifogging rules of the single market. With one bound, Britain would become the Venice of the 21st century. In the real world, Britain would have to redefine fundamentally its relationship with the EU. An arrangement akin to Norway’s would require paying into the EU budget and accepting free movement of labour. Switzerland’s deal is even more cumbersome. Mr Gove invokes a model closer to Albania, Bosnia, Serbia and Ukraine, to deserved derision. The fallback — relying on World Trade Organisation rules — would involve tariffs on UK goods, a poor deal on services (vital for the City of London) and years of fraught negotiations. Britain would end up a rule-taker, not a rule-maker.
Britain’s seat at the table has allowed it to win big arguments in Brussels: on free trade, liberalisation of air travel and telecoms, and EU enlargement to central and eastern Europe. The UK has shaped membership to its needs, securing opt-outs from the euro and the Schengen agreement abolishing border controls. It retains control of income tax and corporate taxation. Education, skills and a skewed housing market hold the UK economy back, not a Brussels bureaucracy the size of Birmingham city council. "
"In a multi-speed, multi-tiered EU, the European superstate is a chimera. Brexiters such as Nigel Farage, the leader of the UK Independence party, see British withdrawal as a handy act of sabotage, hastening the disintegration of the EU. To what end? In or out, Britain would pay a heavy cost. Brexit would reintroduce a border between north and south in Ireland. It would put the territorial integrity of the UK at risk, especially if an independent-minded Scotland overwhelmingly votes to stay. It would trigger a political crisis in the UK — Mr Cameron would surely go — and reawaken the ghosts of nationalism in Europe.
The positive case for Britain in the EU is easily made. To abandon the cause of constructive reform of an admittedly imperfect EU would be more than defeatist. It would be a gratuitous act of self-harm. Business leaders have a duty to spell out the cost of leaving before it is too late."