That article is a bit of a joke IMO.
I loved the bit about CE, having put 2 (actually innovative) products through CE testing myself. I suppose it's unrealistic to expect economists to have a good grasp on this.
The graph showing the UK comparison to those highly comparable economies such as Ireland, Luxembourg and the US is a peach. Bring back Liz Truss with her low corporation tax. All is forgiven.
I didn't realise how much of a boom their had been in services and obviously this offsets a lot of the changes in goods. Since the UK economy appears to be 80% services this is where the action is. Not counting trains in and out of the tunnel. Maybe worth devoting 80% of the article to this rather than focus on the decline in goods. Our economy is changing as result of Brexit. I think most people expected this.
There are a number of other things that made me chuckle but there isn't enough time in the day.
If there is one point I would agree with it is the difficulty of small business exporting to the EU and the impact it has had having experienced this myself. The government needs to work harder here to help small business. But there is probably an argument that the money might be better spent encouraging UK small business to export to areas that are less protectionist rather than trying to flog the dead horse.
It seems like every prediction of doom has some sort of counter point. I'm sure people will make up their own minds, but there isn't much clear here IMO.
It would have been nice to have the GDP growth historical by country. That single clear figure people tend to correlate with economic performance (somewhat flawed maybe but is what it is). Unfortunately that appears to have been forgotten.