# Data Dictionary - UK Generation by Fuel Type - half-hourly, cleaned Parquet

**Units:** vary by `fuel` - read the per-row `unit` column (overall: MW).  Times are UTC.

| column | type | description |
|---|---|---|
| `zone` | str | Always GB |
| `ts` | timestamp (UTC) | Settlement period (30 min) |
| `fuel` | str | Fuel type |
| `gen_mw` | float | Generation, MW |
| `unit` | str | Unit |
| `res_min` | int | Native resolution (30) |

*Source: Contains BMRS data © Elexon Limited.*