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saving"},{"id":"day_periods","value":24.0,"unit":"half-hours","display":"24","provenance":"simulated","source":"periods_2024-06-15.parquet","note":""},{"id":"day_first","value":0.0,"unit":"","display":"05:00","provenance":"simulated","source":"periods_2024-06-15.parquet","note":""},{"id":"day_last","value":0.0,"unit":"","display":"16:30","provenance":"simulated","source":"periods_2024-06-15.parquet","note":""},{"id":"day_sp_first","value":13.0,"unit":"","display":"13","provenance":"observed","source":"periods_2024-06-15.parquet","note":""},{"id":"day_sp_last","value":36.0,"unit":"","display":"36","provenance":"observed","source":"periods_2024-06-15.parquet","note":""},{"id":"day_apx_min","value":73.78,"unit":"GBP/MWh","display":"£74","provenance":"observed","source":"Elexon APX Market Index","note":""},{"id":"day_apx_max","value":105.49,"unit":"GBP/MWh","display":"£105","provenance":"observed","source":"Elexon APX Market 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APX","note":""},{"id":"day_gen_obs_mwh","value":30.862429,"unit":"MWh","display":"30.9","provenance":"derived","source":"periods_2024-06-15.parquet","note":""},{"id":"day_gen_clear_mwh","value":47.584319,"unit":"MWh","display":"47.6","provenance":"hypothetical","source":"periods_2024-06-15.parquet","note":""},{"id":"day_imp_obs_mwh","value":536.991699,"unit":"MWh","display":"537.0","provenance":"simulated","source":"periods_2024-06-15.parquet","note":""},{"id":"day_imp_clear_mwh","value":520.050293,"unit":"MWh","display":"520.1","provenance":"hypothetical","source":"periods_2024-06-15.parquet","note":""},{"id":"day_imp_obs_gbp","value":50012.970883,"unit":"GBP","display":"£50,013","provenance":"simulated","source":"periods_2024-06-15.parquet × APX","note":"illustrative"},{"id":"day_imp_clear_gbp","value":48351.79403,"unit":"GBP","display":"£48,352","provenance":"hypothetical","source":"periods_2024-06-15.parquet × 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