"When it comes to Britain’s economic future, much will depend on whether the issues faced by firms trading with the EU in the early post-transition days are just teething problems, or whether they will worsen as various temporary arrangements end. Early evidence, such as the shortages on the shelves in Northern Ireland and the row over the movement of vaccines from the south into the north, have exposed the difficulty of having one part of the UK effectively still in the EU, which was the condition for approving the Johnson deal. There are reports of substantial rises in export and import bureaucracy and in delivery costs into and out of the UK."