If the UK really does leave the EU, I would not estimate what an enormous task lies ahead for Government and business.
The process will take several years and cost both business and Government tens of billions of pounds.
The Government needs to review all of our laws and decide which European laws that apply to the UK need to be replaced by UK legislation. The Civil Service at it stands simply does not have the resource to do this and the process of passing new laws will choke up the UK parliament.
UK businesses will have to review everything, staffing, contracts with suppliers and customers, regulations, supply chains, IT systems etc.
I would not be surprised if easyJet is looking at splitting its UK and European hubs into a two separate airlines and adopting an IAG type structure.