1. Biomass: We report renewables as defined by Ofgem (the UK energy regulator), which for better or worse includes biomass. However, we recognise this is contentious. To address this, we show the breakdown of generating technologies for each supplier so users can see the composition. But regardless, your point is valid and has been raised several times this week, so we have a PR open to add a filter that lets viewers exclude biomass if they disagree with the UK's legal definition.
2. Nuclear: Our initial focus was on renewable power (where intermittency is highest), but we'll be adding nuclear to the index in the next few weeks. This will increase the scores for EDF, Octopus Energy, and British Gas in particular, who purchase the majority of nuclear power. We've called this out in various places on the index (e.g., on the EDF page: https://matched.energy/clean-power-index/edf-energy).
3. Load shifting: Because we measure generation and demand at a half-hourly level, we do account for load shifting that suppliers like Octopus incentivise through agile tariffs. This is actually one of the key advantages of our approach over historic annual accounting; the half hourly temporal granularity means we reward load shifting behaviour.