In a jam

Just the sight of a juicy, red strawberry on a bright green stalk conjures up English summertime, Wimbledon and afternoon tea. And the market for British strawberries is growing. But if rules on who can come and work in the UK change following the vote to leave the European Union, who is going to pick them? To pick a ripe strawberry, you don't just yank it. The pickers at Langdon Manor Farm in Kent are astonishingly quick at it.