{
  "overlap_window": {
    "start": "2025-08-01",
    "end": "2026-03-29",
    "last_month_partial": true
  },
  "monthly_volume_check": {
    "2025-08": {
      "ours_gwh": 812.2,
      "neso_gwh": 810.9,
      "ratio": 1.0017
    },
    "2025-09": {
      "ours_gwh": 1084.2,
      "neso_gwh": 1081.7,
      "ratio": 1.0023
    },
    "2025-10": {
      "ours_gwh": 1293.6,
      "neso_gwh": 1293.1,
      "ratio": 1.0004
    },
    "2025-11": {
      "ours_gwh": 960.9,
      "neso_gwh": 958.3,
      "ratio": 1.0027
    },
    "2025-12": {
      "ours_gwh": 1009.2,
      "neso_gwh": 1004.4,
      "ratio": 1.0048
    },
    "2026-01": {
      "ours_gwh": 1231.5,
      "neso_gwh": 1231.4,
      "ratio": 1.0001
    },
    "2026-02": {
      "ours_gwh": 864.4,
      "neso_gwh": 864.4,
      "ratio": 1.0
    },
    "2026-03": {
      "ours_gwh": 1364.6,
      "neso_gwh": 1363.2,
      "ratio": 1.0011
    }
  },
  "gate": "complete months must agree within 2%",
  "gate_passed": true,
  "neso_report_spot_checks": {
    "2026-05": {
      "neso_report_gwh": 591,
      "ours_gwh": 591
    },
    "2026-06": {
      "neso_report_gwh": 709,
      "ours_gwh": 707
    }
  },
  "per_bmu_outliers_beyond_2pct": {
    "BENBW-1": {
      "ours_gwh": 28.5,
      "neso_gwh": 22.1
    }
  },
  "per_bmu_bmus_checked": 51,
  "unit_note": "NESO Wind BOA Volumes' BOA_Volume column is MW per half-hour settlement period; energy = value x 0.5. Uncorrected, the dataset reads exactly 2x true energy.",
  "wind_cost_vs_constraints_total": {
    "our_wind_curtailment_gbp_12m": 408772062,
    "mbss_constraints_gbp_12m": 2509618124,
    "wind_share": 0.163,
    "note": "Number 1 is what was paid to wind farms to switch off; Number 3 is the whole constraint bill (incl. turning up gas south of the boundary, voltage, stability). NESO publishes no wind-only cost, so volumes are the primary reconciliation."
  }
}