diff --git a/content/dataset/development-plan-document-type.md b/content/dataset/development-plan-document-type.md
index d17654e85..29cbc15aa 100644
--- a/content/dataset/development-plan-document-type.md
+++ b/content/dataset/development-plan-document-type.md
@@ -35,3 +35,6 @@ typology: category
 wikidata: ''
 wikipedia: ''
 ---
+The type of document that an authority is using to create their overall plan.
+
+Use this with [development-plan-document](https://www.planning.data.gov.uk/dataset/development-plan-document) to find the plan document that you are interested in. For example, a core strategy.
diff --git a/content/dataset/development-plan-document.md b/content/dataset/development-plan-document.md
index eefcf15fb..87c2d32ff 100644
--- a/content/dataset/development-plan-document.md
+++ b/content/dataset/development-plan-document.md
@@ -92,3 +92,8 @@ typology: document
 wikidata: ''
 wikipedia: ''
 ---
+The documents that an authority use to create their overall plan. For example, the neighbourhood plan.
+
+Every document within a plan. Each row contains a link to a published document on the authority's website.
+
+Use this with [development-plan-document-type](https://www.planning.data.gov.uk/dataset/development-plan-document-type) to find the plan document that you are interested in. For example, a transport assessment.
diff --git a/content/dataset/plan-timetable.md b/content/dataset/plan-timetable.md
index 703aeb4bc..4429638ec 100644
--- a/content/dataset/plan-timetable.md
+++ b/content/dataset/plan-timetable.md
@@ -88,3 +88,6 @@ typology: timetable
 wikidata: ''
 wikipedia: ''
 ---
+When an authority will prepare their plan, so that they can share their overall timescale for plan-making.
+
+Use this to find out what stage an authority is in their plan preparation, and when milestones are expected to be reached.