His "sobering" conclusion is that in the final quarter of 2021, GDP (gross domestic product) was 5.2% smaller, investment 13.7% lower, and goods trade 13.6% lower than what they would have been had the UK remained in the EU.
"The UK had a particularly deep recession in 2020, but it ended COVID restrictions sooner than many of its peers, thanks in part to starting its vaccination campaign early in 2021. That should have made its recovery from COVID faster than other countries, not slower," he says.
https://www.euronews.com/my-europe/2022/07/05/brexit-damage-is-eu-exit-now-hitting-uks-economy-harder-than-covid