"We have thoroughly enjoyed working with River Street Events on BBC Gardeners’ World Live. Whilst we’re sad about not being involved going forward, we are delighted that River Street Events will pick up managing the horticultural content for the Show to present gardens and plant displays that have a significant and important role at the centre of show. RHS Members will continue to benefit from a discount to the show."
River Street Events managing director Laura Biggs said: "We are keen to focus on a solely-branded BBC Gardeners’ World Live, working closely with our colleagues at BBC Gardeners’ World TV programme and Magazine. We have exciting plans for the show, developing its brand values and continuing to invest and deliver fantastic shows full of inspiration and great business opportunities.
"We thank the RHS for all the support they have given the show since its conception in 1991. Without their support, BBC Gardeners’ World Live would not be the successful, much-loved Show it is today."
Mattingley said: "BBC Gardeners’ World Live is a great Show and we’re pleased to have been able to be associated with it for so long, but both River Street Events and the RHS feel the time is right for change and each of us is excited about the new opportunities the changes will offer."