hydrogen regional growth Cost Challenge Taskforce CCS Lessons Learned Oil and Gas Authority CCUS UNFCCC CCSA cost-competitive CCS North Sea CO2-EOR Joint Industry Project SCCS Delivering CCS low-carbon heat Clean Growth Strategy Energy Bill 2015 energy demand CCUS Cost Challenge Taskforce CCS Strategy CCS Clusters £85/MWh climate change CCS competition Phase 2 CCS Spending Review 2015 oil and gas fifth carbon budget Cost Reduction Industrial CCS COP21 industrial strategy Paris Agreement CO2MultiStore energy intensive industries CCS Technology carbon infrastructure CCS Costs