Outside the single market, what kind of deal can Britain's services sector hope for?

Professional and business services account for more than a tenth of the UK economy. Leaving the single market means it will no longer enjoy the passporting rights that give the financial sector smooth access to EU markets. John Catalfamo and Laura Arts (LSE) look at the limited options available to Theresa May as she tries to reconcile Brexiters' demands for regulatory autonomy with the need to negotiate access to the Single Market.