{
 "metric": "security-headers",
 "segment": "gb-dormant",
 "anchor": "company",
 "label": "UK dormant companies",
 "population": "UK dormant companies",
 "states": [
  "strong",
  "partial",
  "missing"
 ],
 "quiet_failure_states": [
  "partial",
  "missing"
 ],
 "measurement": "Tier 3a; check `Strict-Transport-Security`, `Content-Security-Policy`, `X-Frame-Options` on the homepage response. Denominator: `has_web`.",
 "why_it_matters": "HSTS is what stops the first, downgradeable request; CSP is what limits the damage of injected script. Both are one-line changes, and both are commonly switched off silently by a framework upgrade or a proxy change.",
 "limits": null,
 "data_tier": "http_3a",
 "population_predicate": "has_web",
 "entity_type": "domain",
 "kind": "failure",
 "latest": {
  "day": "2026-08-13",
  "n": 145,
  "qf_pct": 77.93,
  "ci": [
   70.51,
   83.91
  ],
  "dist": {
   "strong": 22.07,
   "partial": 24.83,
   "missing": 53.1
  },
  "snapshot": "uk-companies-house-per600-seed20260728"
 },
 "series": [
  {
   "day": "2026-08-01",
   "n": 66,
   "qf_pct": 77.27,
   "ci": [
    65.83,
    85.71
   ],
   "dist": {
    "strong": 22.73,
    "partial": 22.73,
    "missing": 54.55
   },
   "snapshot": "uk-companies-house-per300-seed20260728"
  },
  {
   "day": "2026-08-03",
   "n": 67,
   "qf_pct": 74.63,
   "ci": [
    63.07,
    83.51
   ],
   "dist": {
    "strong": 25.37,
    "partial": 22.39,
    "missing": 52.24
   },
   "snapshot": "uk-companies-house-per300-seed20260728"
  },
  {
   "day": "2026-08-04",
   "n": 148,
   "qf_pct": 78.38,
   "ci": [
    71.07,
    84.25
   ],
   "dist": {
    "strong": 21.62,
    "partial": 24.32,
    "missing": 54.05
   },
   "snapshot": "uk-companies-house-per600-seed20260728"
  },
  {
   "day": "2026-08-05",
   "n": 146,
   "qf_pct": 78.08,
   "ci": [
    70.7,
    84.03
   ],
   "dist": {
    "partial": 24.66,
    "strong": 21.92,
    "missing": 53.42
   },
   "snapshot": "uk-companies-house-per600-seed20260728"
  },
  {
   "day": "2026-08-06",
   "n": 146,
   "qf_pct": 78.08,
   "ci": [
    70.7,
    84.03
   ],
   "dist": {
    "strong": 21.92,
    "partial": 24.66,
    "missing": 53.42
   },
   "snapshot": "uk-companies-house-per600-seed20260728"
  },
  {
   "day": "2026-08-13",
   "n": 145,
   "qf_pct": 77.93,
   "ci": [
    70.51,
    83.91
   ],
   "dist": {
    "strong": 22.07,
    "partial": 24.83,
    "missing": 53.1
   },
   "snapshot": "uk-companies-house-per600-seed20260728"
  }
 ],
 "license": "CC BY 4.0",
 "source": "https://quietfailures.com/datasets/security-headers/gb-dormant"
}