BBC Gardeners’ World Autumn Fair returns to Audley End next month for three days of horticultural delights in association with English Heritage. This year’s special guests are Adam Frost on Friday, August 30; Joe Swift on Saturday, August 31 and, for the first time, Rachel de Thame on Sunday, September 1. The BBC Gardeners’ World television show presenters will join the editors of BBCGardeners’ World Magazine for some seasonal gardening chat. Throughout the event, horticulturalist and presenter David Hurrion will be talking plants with experts from stage sponsor, Regent Seven Seas Cruises, as …