Your article on the potential of blockchain (“Forget the paper trail — blockchain set to shake up trade finance” (FT.com, December 3), raises the issue of the application of this technology to trade finance, but ignores its far wider application to trade itself.
Blockchain heralds the possibility of trade where every aspect of the movement of goods can be monitored and recorded. In a post-Brexit world this would mean not just the free movement of goods with no physical intervention at borders, but the safe knowledge that every ingredient in every sandwich has been tracked and verified.
In practice this may well be what enables the UK to be compliant with EU food regulations while also in a trade agreement with the US — with no risk that chlorinated chicken from the latter enters the food chain of the former through an inadvertent pie.
Charles Le Gallais
Taunton, Somerset, UK