Bioenergy could provide upwards of a tenth of UK total primary energy supply by 2050 and can be supplied as heat, power, liquid transport fuel and biomethane. Achieving optimal deployment, sustainably and at lowest cost, will require significant innovation on advanced conversion technologies and their feedstocks. nnovation in bioenergy has the potential to reduce UK energy system costs by £42bn (£6-101bn) by 2050. International business development is calculated to provide further economic value to the UK of £19 (6-33) bn. Significant market barriers are identified which could restrict the UK from realising these domestic savings and international markets. The report also includes potential new feedstocks for bioenergy by 2050 which includes macroalgae.