It's medals day at the RHS Chelsea Flower Show. Monty Don and Joe Swift will be revealing which show garden designs have won gold and reviewing the medal results from around the showground. They'll also be talking to the designer who has won Chelsea's most prestigious prize, the Best in Show award. Carol Klein seeks out the record-breaking exhibitors in the Great Pavilion, and we'll be discovering how one garden designer has brought her vision of the Middle East to Main Avenue.