RHS Chelsea Flower Show: Chelsea Flower Show 2012

SYNOPSIS

Alan Titchmarsh presents some of the year's most memorable show-garden designs, spots notable celebrity visitors attending the horticultural event, and sees the new flowers being launched in the Great Pavilion. Plus, garden writer James Alexander-Sinclair explores how the show is marking the Queen's Diamond Jubilee. Continues tomorrow on BBC1 at 12.30pm.