This deliverable provides the benefit case of accelerating - by means of a technology demonstrator - technologies identified as promising by analysis of the UK bioenergy system using the Biomass Value Chain Model (BVCM) toolkit.The benefit case is assessed based on two main criteria: value of technology acceleration and demonstrator benefits. Based on the analysis of a wide range of case studies using the BVCM toolkit, the benefit cases for biosynthetic natural gas (bioSNG), biohydrogen, pyrolysis fuels, and carbon capture and storage (CCS) technologies for power generation are assessed in detail. BioSNG technology emerges as the highest in terms of value of technology acceleration, and potential benefit of a UK demonstration activity in bioSNG exists, although a series of demo plants are already planned for the near future abroad.