Former Brussels correspondent Adam Fleming explores how businesses have adapted to new trade rules, three years after the UK left the EU. He finds out why allergy-friendly nutrition bars are being sold to Australia and the Middle East instead of the EU, and the reason exports of British eels have ground to a halt.Presenter: Adam FlemingProducers: Diane Richardson and Sally AbrahamsEditor: China CollinsProduction Co-ordinator: Janet StaplesSound: Neil Churchill