generated: '2026-07-28'
method: searched
source: >-
  https://consultations.caa.co.uk/api/ (version index),
  https://consultations.caa.co.uk/api/2.0/ .. /2.4/ (per-version reference pages),
  https://help.delib.net/article/350-api-v2-x-developers-guide , plus live probes
  2026-07-28.
description: >-
  Lifecycle posture for the UK Civil Aviation Authority's one documented API. The
  CAA publishes no API deprecation policy, no SLA and no status page; what it does
  publish is a concurrently-served, path-versioned API whose per-version reference
  pages mark superseded parameters and fields "(deprecated)" in place.
versioning:
  scheme: uri-path
  current: '2.4'
  concurrent: ['2.0', '2.1', '2.2', '2.3', '2.4']
  index: https://consultations.caa.co.uk/api/
  docs: https://consultations.caa.co.uk/api/2.4/
  notes: >-
    "The following API versions are available within this Citizen Space site: 2.0,
    2.1, 2.2, 2.3, 2.4." All five were verified live (HTTP 200) on 2026-07-28; 2.5
    returns 404. Nothing indicates any version has ever been withdrawn.
deprecation:
  policy_url: null
  sunset_header: false
  policy_published: false
  practice: in-place-annotation
  notes: >-
    No RFC 8594 Sunset or Deprecation header, and no deprecation-policy page exists
    on any CAA domain. Deprecation is communicated only by the "(deprecated)" label
    inside the reference page for the current version. No removal date is ever
    given, and old versions stay served indefinitely, so the effective policy is
    "nothing is removed".
  deprecated_parameters:
    - source: openapi/uk-caa-consultations-api-openapi.yml#json_search_results
      name: ct
      note: >-
        "(deprecated) Legacy activity type" in 2.4; superseded by `at`. Still
        documented and still accepted.
  deprecated_fields:
    - field: department
      note: '(deprecated) The name of the department that the activity belongs to. Superseded by workspace_title in 2.3.'
    - field: dept
      note: '(deprecated) The ID of the department that the activity belongs to. Superseded by workspace_id in 2.3.'
    - field: type
      note: '(deprecated) The legacy type. Superseded by activity_type / type_string in 2.4.'
sla:
  url: null
  uptime_target: null
  notes: >-
    No SLA, uptime commitment or support commitment is published for any CAA API
    surface. No API terms of service exist either.
status_page:
  url: null
  notes: >-
    No status page. status.caa.co.uk does not resolve (curl exit 000, probed
    2026-07-28); no status.* or *.statuspage.io property was found for the CAA. No
    StatusPage pointer is emitted.
support:
  channel: none-for-developers
  notes: >-
    There is no developer support channel. The CAA publishes a general enquiry
    route and a statutory information-request route (Freedom of Information Act
    2000 / EIR 2004 / UK GDPR) at
    https://www.caa.co.uk/about-us/information-requests/accessing-information-held-by-the-caa/
    but nothing addressed to API consumers.
changelog:
  artifact: changelog/uk-caa-changelog.yml
  notes: >-
    No dated changelog is published. The changelog artifact is reconstructed from
    the diff between the five concurrently-served version reference pages, each of
    which was fetched on 2026-07-28.
data_lifecycle:
  notes: >-
    Bulk aviation data is file-shaped and versioned by publication date, not by API
    version: monthly airport, punctuality and airline statistics as CSV/PDF behind
    opaque /Documents/Download/{siteId}/{guid}/{docId} URLs with no index or
    enumeration, and the full G-INFO aircraft register as a paid MS Excel
    subscription licensed for single-PC use.