As far as I know, Immingham is ready to take vastly increased traffic and DSA already ships in fresh produce by air and has been vastly underused for this purpose since opening. Indeed a large Antonov is a regular visitor with heavy stuff and a freight 747 arrives with cut flowers from Egypt almost weekly. That, I'm sure could easily bring in fruit and vegetables as well, daily if necessary. Everything's in place, including distribution from the immediate area via underused motorways. Tesco and Ikea amongst others have local distribution facilities. Doncaster has been a transport hub since Roman times and could easily become a major player in the import/export of materials again.