Some of the UK's biggest supermarket chains have warned that their shelves could be short of fruits and vegetables.After a new strain of coronavirus was identified, France banned cargo from crossing the English Channel. .The French and UK governments did soon reach an agreement to allow cargo drivers to travel between the two countries.But unfortunately for grocery stores, it is contingent on giving each driver a COVID-19 test.Lufthansa flew 80 tons of fruit and vegetables into the UK, in an attempt to prevent after-Christmas shortages.But the biggest problem is undoubtedly the thousands of trucks and cargo vans that are currently parked in Kent.And even that generous cargo flight can't compensate for the amount of food that wasn't delivered this week