"Critics of #freeports say there is little evidence they attract new investment or help the economy. The Office for Budget Responsibility said in 2021 that tax breaks in England’s freeports would cost the government £50m a year and that their impact on GDP was likely to be so small it would be “difficult to discern even in retrospect”."
https://www.theguardian.com/business/2024/oct/25/new-uk-freeports-budget-labour-starmer