{"unit_type": "constituency", "unit": "Harpenden and Berkhamsted", "slug": "harpenden-and-berkhamsted", "latest_week": "2026-09-07", "latest": {"week": "2026-09-07", "incorporated": 21, "expected_trade": 8.9, "expected_trade_own": 8.9, "verified_sites": 0, "food_premises": 0, "no_site": 12, "checked": 21, "at_agent": 0, "property": 1, "operating_own": 20, "agent_share": 0.0, "property_share": 0.048, "last_year_active": null, "last_year_on_register": null, "incomplete": false}, "baseline_52w_active": null, "series": [{"week": "2026-06-01", "incorporated": 24, "expected_trade": 10.6, "expected_trade_own": 10.6, "verified_sites": 0, "food_premises": 0, "no_site": 0, "checked": 0, "at_agent": 0, "property": 2, "operating_own": 22, "agent_share": 0.0, "property_share": 0.083, "last_year_active": null, "last_year_on_register": null, "incomplete": false}, {"week": "2026-06-08", "incorporated": 9, "expected_trade": 3.5, "expected_trade_own": 3.5, "verified_sites": 0, "food_premises": 0, 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