HMRC has published statistics for the August 2016 trade in goods. These show that for August the UK was a net importer in goods with the rest of the EU by £7.7 billion.
The USA was the UK’s biggest export partner, despite and/or because of the EU’s inability to finalise a transatlantic trade agreement. The UK’s biggest import source was goods from Germany, followed by the USA, China and Switzerland in that order.
So, the statistics show, the remaining EU countries would be much more damaged by angrily adding customs duty and VAT to their exports to the UK, than would the UK, if the EU started a petulant trade and tax war as punishment for Brexit.
Tax Barrister, Accountant