Monty Don and Joe Swift are back with more news from the 2015 RHS Chelsea Flower Show. They celebrate the work of the show-garden designers who have created masterpieces where space is at a premium. The team reveals how history is very much part of the present in this year's garden designs. Plus, the most dazzling bedding plants from the Great Pavilion take centre stage and there is a catch-up with the exhibitor who has won the coveted RHS Plant of the Year award.