Bringing more battery storage and pumped hydro online will help cut down curtailment of wind farms, which damages the business case for renewable energyEnergy secretary Ed Miliband (right) with Tom Glover (left), the UK chief of German power giant RWE.Photo: Zara Farrar / No 10 Downing StreetCosmo SandersonJournalistFollow me My Alerts is a service for subscribers. Please login or subscribe in order to use My Alerts.SubscribeLoginVisual and Data JournalismPublished 30 June 2026, 04:33Updated 30 June 2026, 04:33UKEurope