The advantage of using WTO terms is the UK is not bound by EU rules or committed to agree to its red tape and regulations, while it is able to strike lucrative free trade deals around the world.
Mr Burrage points out that exports by the UK to 111 countries outside the EU under WTO rules grew by 2.9 per cent between 1993 and 2015.
This was more than three times greater than the 0.9 per cent growth in exports to EU countries in the same period and one percent higher than trade with the 62 countries which have trade agreements with the EU, making it the “best option” for Britain.
Mr Burrage said: “Mrs May could deliver exactly what she promised at Lancaster House, and stay well behind all her red lines without the least difficulty.
“There would be no quarrel about the sequencing of negotiations, no reason for UK negotiators to be supplicants on their knees, since they would finally have some leverage.