diff --git a/docs/src/whatsnew/latest.rst b/docs/src/whatsnew/latest.rst
index 6e50aaa487..18386dd10d 100644
--- a/docs/src/whatsnew/latest.rst
+++ b/docs/src/whatsnew/latest.rst
@@ -16,6 +16,8 @@ This document explains the changes made to Iris for this release
 
    The highlights for this minor release of Iris include:
 
+   * We've added support for `UGRID`_ meshes which can now be loaded and attached
+     to a cube.
    * We've dropped support for `Python 3.6`_
 
    And finally, get in touch with us on `GitHub`_ if you have any issues or
@@ -37,6 +39,26 @@ This document explains the changes made to Iris for this release
 ✨ Features
 ===========
 
+#. `@bjlittle`_, `@pp-mo`_ and `@trexfeathers`_ added support for unstructured
+   meshes, as described by `UGRID`_. This involved adding a data model (:pull:`3968`,
+   :pull:`4014`, :pull:`4027`, :pull:`4036`, :pull:`4053`) and API (:pull:`4063`,
+   :pull:`4064`), and supporting representation (:pull:`4033`, :pull:`4054`) and
+   loading (:pull:`4058`) of data on meshes.
+   Most of this new API can be found in :mod:`iris.experimental.ugrid`. The key
+   objects introduced are :class:`iris.experimental.ugrid.Mesh`,
+   :class:`iris.experimental.ugrid.MeshCoord` and
+   :obj:`iris.experimental.ugrid.PARSE_UGRID_ON_LOAD`.
+   A :class:`iris.experimental.ugrid.Mesh` contains a full description of a UGRID
+   type mesh. :class:`~iris.experimental.ugrid.MeshCoord`\ s are coordinates that
+   reference and represent a :class:`~iris.experimental.ugrid.Mesh` for use
+   on a :class:`~iris.cube.Cube`. :class:`~iris.cube.Cube`\ s are also given the
+   property :attr:`~iris.cube.Cube.mesh` which returns a
+   :class:`~iris.experimental.ugrid.Mesh` if one is attached to the
+   :class:`~iris.cube.Cube` via a :class:`~iris.experimental.ugrid.MeshCoord`.
+   Finally, the context manager :obj:`~iris.experimental.ugrid.PARSE_UGRID_ON_LOAD`
+   provides a way to load UGRID files so that :class:`~iris.cube.Cube`\ s can be
+   returned with a :class:`~iris.experimental.ugrid.Mesh` attached.
+
 #. `@pelson`_ and `@trexfeathers`_ enhanced :meth:`iris.plot.plot` and
    :meth:`iris.quickplot.plot` to automatically place the cube on the x axis if
    the primary coordinate being plotted against is a vertical coordinate. E.g.
@@ -242,3 +264,4 @@ This document explains the changes made to Iris for this release
 .. _xxhash: http://cyan4973.github.io/xxHash/
 .. _conda-lock: https://github.com/conda-incubator/conda-lock
 .. _asv: https://asv.readthedocs.io/en/stable/
+.. _UGRID: http://ugrid-conventions.github.io/ugrid-conventions/