The organiser of the 2010 Royal Horticultural Society Chelsea Flower Show says the five-day exhibition sold out of its annually-capped 157,000 tickets 12 days in advance, making it a record-breaking result. Last year, the show sold out of its quota three days in advance. It show manager, Alex Denman, says: “The economy is improving and we are moving out of the recession. Visitors are staying at...