Career: After a stint presenting on The Weather Channel, she trained with the Met Office in 1998 for a weather presenting role at the BBC. Away from predicating if it will rain or shine, Kirkwood has been a reporter on The One Show and appeared on the panel show Would I Lie to You? In August 2015, it was announced that she would be taking part in Strictly Come Dancing.

Career: Titchmarsh moved into editing gardening books, writing and broadcasting, and had a stint as a host on Pebble Mill at One on BBC One in the 1990s. He joined Gardeners' World as the main host in 1996 and Ground Force began a year later. After writing a number of horticultural books, he turned to writing novels. His first one, Only Dad, was published in 2001. More novels, gardening books and three biographies followed. He's also hosted the Proms, various series for Radio 2 and Classic FM and Love Your Garden. Despite retiring from The Alan Titchmarsh Show in 2014, he kept busy with writing and presenting commitments. TV shows he has presented since include Britain's Best Back Gardens, Masterpiece with Alan Titchmarsh and Love Your Home.

Career: In 1988, Don moved to Herefordshire with his wife and children, and when the jewellery business collapsed, turned to working in TV and journalism. He has on has appeared on programmes including This Morning, Holiday Programme, Tomorrow's World, Real Gardens, Fork to Fork, Lost Gardens and Don Roaming. He joined Gardeners' World in 2002, and became the show's first self-taught main presenter in 2003. An author and columnist, his books include My Roots, The Jewel Garden, The Complete Gardener, The Prickotty Bush, The Weekend Gardener, The Sensuous Garden, Gardening Mad, Urban Jungle and Fork to Fork. He suffered a minor stroke in 2008, and gave up Gardeners' World until 2011. He also presents More4's Monty Don's Real Craft.

Career: De Thame had a successful modelling career that saw her appearing in a number of TV advertisements. Her casting agents started suggesting her for acting roles and, in 1998, she appeared in the mini-series Merlin. She decided not to follow an acting career, however, and decided to get into plants and gardening instead. After studying practical horticulture and plants and plantsmanship at the English Gardening School for two years, De Thame auditioned for Gardeners' World. She initially presented the programme every week and, as of 2014, continues to make occasional appearances on the show. De Thame has also presented such TV gardening shows as Small Town Gardens, Gardening with the Experts and Countrywise. She also co-presents the BBC's annual coverage of the Chelsea Flower Show. Her non-gardening TV appearances include Going for a Song and Call My Bluff.

Career: She made her TV debut on Gardeners' World in 1989 and has since presented other gardening programmes such as Real Gardens and Open Gardens. Recent projects include Life in a Cottage Garden with Carol Klein which follows a year in the life of Carol's garden at Glebe Cottage in North Devon, and Grow Your Own Veg, which encouraged people to start growing their own vegetables. She is known for her cheerful presenting style and is hugely popular among gardeners.