System1 Group PLC announces that, in line with the continued evolution of the Company, John Kearon, previously Chief Executive Officer, has assumed the title of 'Founder and Executive President' and Stefan Barden, previously Chief Operating Officer, the title of 'Chief Executive Officer'. Their internal responsibilities are unaffected, with John leading the Company direction, product development and external facing parts of the business, and Stefan leading the Company's organisation, technical development and operational parts of the business. No board changes are expected to arise as a result of this development. Stefan will remain an executive director rather than reverting to the purely advisory role indicated last year.