diff --git a/lib/iris/__init__.py b/lib/iris/__init__.py
index 937a8946d4..2e7eba5892 100644
--- a/lib/iris/__init__.py
+++ b/lib/iris/__init__.py
@@ -121,7 +121,7 @@ def callback(cube, field, filename):
 
 
 # Iris revision.
-__version__ = '2.1.1dev0'
+__version__ = '2.2.0dev0'
 
 # Restrict the names imported when using "from iris import *"
 __all__ = ['load', 'load_cube', 'load_cubes', 'load_raw',
diff --git a/lib/iris/fileformats/pp.py b/lib/iris/fileformats/pp.py
index 24dab953f0..e49d1134d5 100644
--- a/lib/iris/fileformats/pp.py
+++ b/lib/iris/fileformats/pp.py
@@ -245,6 +245,11 @@ class STASH(collections.namedtuple('STASH', 'model section item')):
         >>> print(iris.fileformats.pp.STASH(1, 16, 203))
         m01s16i203
 
+    A stash object can be compared directly
+    to its string representation:
+        >>> iris.fileformats.pp.STASH(1, 0, 4) == 'm01s0i004'
+        True
+
     """
 
     __slots__ = ()