first_seen_at

When we first saw this notice, which is not when the source posted it.

first_seen_at is the timestamp of the first crawl in which this notice appeared to us.

It is deliberately separate from posted_at, which is the source's own posting date. They are different facts and frequently different dates: a notice posted before we connected its feed is seen late, and saying otherwise would misrepresent both our coverage and the programme's timeline.

Shown as: on the newly-added slice, and in freshness reporting. When absent: never.

posted_at

The date the source itself posted the notice.

last_verified_at

The date we last confirmed this record against its source.

Field referenceGrant fields