diff --git a/lib/iris/fileformats/ff.py b/lib/iris/fileformats/ff.py
deleted file mode 100644
index 3b61dcb873..0000000000
--- a/lib/iris/fileformats/ff.py
+++ /dev/null
@@ -1,89 +0,0 @@
-# (C) British Crown Copyright 2010 - 2016, Met Office
-#
-# This file is part of Iris.
-#
-# Iris is free software: you can redistribute it and/or modify it under
-# the terms of the GNU Lesser General Public License as published by the
-# Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# Iris is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with Iris.  If not, see <http://www.gnu.org/licenses/>.
-"""
-Provides UK Met Office Fields File (FF) format specific capabilities.
-
-.. deprecated:: 1.10
-
-    This module has now been *deprecated*.
-    Please use :mod:`iris.fileformats.um` instead :
-    That contains equivalents for the key features of this module.
-
-    The following replacements may be used.
-
-    * for :class:`FF2PP`, use :meth:`iris.fileformats.um.um_to_pp`
-    * for :meth:`load_cubes`, use :meth:`iris.fileformats.um.load_cubes`
-    * for :meth:`load_cubes_32bit_ieee`, use
-      :meth:`iris.fileformats.um.load_cubes_32bit_ieee`.
-
-"""
-
-from __future__ import (absolute_import, division, print_function)
-from six.moves import (filter, input, map, range, zip)  # noqa
-import six
-
-import warnings
-
-from iris._deprecation import warn_deprecated
-
-# Issue a deprecation message when the module is loaded.
-warn_deprecated("The module 'iris.fileformats.ff' is deprecated. "
-                "Please use iris.fileformats.um as a replacement, which "
-                "contains equivalents for all important features.")
-
-# Directly import various simple data items from the 'old' ff module.
-from iris.fileformats._ff import (
-    IMDI,
-    FF_HEADER_DEPTH,
-    DEFAULT_FF_WORD_DEPTH,
-    _FF_LOOKUP_TABLE_TERMINATE,
-    UM_FIXED_LENGTH_HEADER,
-    UM_TO_FF_HEADER_OFFSET,
-    FF_HEADER,
-    _FF_HEADER_POINTERS,
-    _LBUSER_DTYPE_LOOKUP,
-    X_COORD_U_GRID,
-    Y_COORD_V_GRID,
-    HANDLED_GRIDS,
-    REAL_EW_SPACING,
-    REAL_NS_SPACING,
-    REAL_FIRST_LAT,
-    REAL_FIRST_LON,
-    REAL_POLE_LAT,
-    REAL_POLE_LON,
-    Grid,
-    ArakawaC,
-    NewDynamics,
-    ENDGame,
-    FFHeader,
-    FF2PP,
-    load_cubes,
-    load_cubes_32bit_ieee
-)
-
-# Ensure we reproduce documentation as it appeared in v1.9,
-# but with a somewhat improved order of appearance.
-__all__ = (
-    'load_cubes',
-    'load_cubes_32bit_ieee',
-    'FF2PP',
-    'Grid',
-    'ArakawaC',
-    'NewDynamics',
-    'ENDGame',
-    'FFHeader',
-)
diff --git a/lib/iris/tests/unit/fileformats/ff/test__ff_equivalents.py b/lib/iris/tests/unit/fileformats/ff/test__ff_equivalents.py
deleted file mode 100644
index 27288ded7f..0000000000
--- a/lib/iris/tests/unit/fileformats/ff/test__ff_equivalents.py
+++ /dev/null
@@ -1,264 +0,0 @@
-# (C) British Crown Copyright 2013 - 2016, Met Office
-#
-# This file is part of Iris.
-#
-# Iris is free software: you can redistribute it and/or modify it under
-# the terms of the GNU Lesser General Public License as published by the
-# Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# Iris is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with Iris.  If not, see <http://www.gnu.org/licenses/>.
-"""
-Unit tests for :class:`iris.fileformat.ff`.
-
-The real functional tests now all target :class:`iris.fileformat._ff`.
-This is just here to check that the one is a clean interface to the other.
-
-"""
-
-from __future__ import (absolute_import, division, print_function)
-from six.moves import (filter, input, map, range, zip)  # noqa
-
-# Import iris.tests first so that some things can be initialised before
-# importing anything else.
-import iris.tests as tests
-
-import mock
-import warnings
-
-with warnings.catch_warnings():
-    # Also suppress invalid units warnings from the Iris loader code.
-    warnings.filterwarnings("ignore")
-    import iris.fileformats.ff as ff
-
-
-# A global used to catch call information in our mock constructor calls.
-# Used because, as patches, those calls don't receive the test context
-# (i.e. the call gets a different 'self').
-constructor_calls_data = []
-
-
-class Mixin_ConstructorTest(object):
-    # A test mixin for the 'ff' wrapper subclasses creation calls.
-    # For each one, patch out the __init__ of the target class in '_ff', and
-    # check that the ff class constructor correctly calls this with both
-    # unnamed args and keywords.
-
-    # Name of the target class (in 'ff'): **inheritor defines**.
-    target_class_name = 'name_of_a_class_in_ff'
-
-    # Constructor function replacement: **inheritor defines**.
-    #    @staticmethod
-    #    def dummy_constructor_call(self):
-    #        pass
-    # N.B. do *not* actually define one here, as oddly this affects the call
-    # properties of the overriding methods ?
-
-    def constructor_setup(self):
-        """
-        A 'setUp' helper method.
-
-        Only defined as a separate method because tests can't inherit an
-        *actual* 'setUp' method, for some reason.
-
-        """
-        # Reset the constructor calls data log.
-        global constructor_calls_data
-        constructor_calls_data = []
-
-        # Define an import string for the __init__ of the corresponding class
-        # in '_ff', where the real implementation is.
-        tgt_fmt = 'iris.fileformats._ff.{}.__init__'
-        patch_target_name = tgt_fmt.format(self.target_class_name)
-
-        # Patch the implementation class with the replacement 'dummy'
-        # constructor call, to record usage.
-        self.patch(patch_target_name, self.dummy_constructor_call)
-
-    def check_call(self, target_args, target_keys, expected_result):
-        """
-        Test instantiation of the target class.
-
-        Call with given args and kwargs, and check that the parent class
-        (in _ff) got the expected call.
-
-        """
-        # Invoke the main target while blocking warnings.
-        # The parent class is already patched, by the setUp operation.
-        with warnings.catch_warnings():
-            warnings.filterwarnings("ignore")
-            test_class = getattr(ff, self.target_class_name)
-            result = test_class(*target_args, **target_keys)
-
-        # Check we returned the right type of thing.
-        self.assertIsInstance(result, test_class)
-
-        # Check the call args that the parent constructor call received.
-        # Note: as it is a list, this also ensures we only got *one* call.
-        global constructor_calls_data
-        self.assertEqual(constructor_calls_data, [expected_result])
-
-
-class Mixin_Grid_Tests(object):
-    # A mixin with tests for the 'Grid' derived classes.
-
-    @staticmethod
-    def dummy_constructor_call(self, column_dependent_constants,
-                               row_dependent_constants,
-                               real_constants, horiz_grid_type):
-        # A replacement for the 'real' constructor call in the parent class.
-        # Used to check for correct args and kwargs in the call.
-        # Just record the call arguments in a global, for testing.
-        global constructor_calls_data
-        # It's global because in use, we do not have the right 'self' here.
-        # Note: as we append, it contains a full call history.
-        constructor_calls_data += [(column_dependent_constants,
-                                    row_dependent_constants,
-                                    real_constants,
-                                    horiz_grid_type)]
-
-    def test__basic(self):
-        # Call with four unnamed args.
-        self.check_call(['cdc', 'rdc', 'rc', 'ht'], {},
-                        expected_result=('cdc', 'rdc', 'rc', 'ht'))
-
-    def test__all_named_keys(self):
-        # Call with four named keys.
-        kwargs = {'column_dependent_constants': 1,
-                  'row_dependent_constants': 2,
-                  'real_constants': 3,
-                  'horiz_grid_type': 4}
-        self.check_call([], kwargs, expected_result=(1, 2, 3, 4))
-
-    def test__badargs(self):
-        # Make sure we can catch a bad number of arguments.
-        with self.assertRaises(TypeError):
-            self.check_call([], {})
-
-    def test__badkey(self):
-        # Make sure we can catch an unrecognised keyword.
-        with self.assertRaises(TypeError):
-            self.check_call([], {'_bad_key': 1})
-
-
-class Test_Grid(Mixin_ConstructorTest, Mixin_Grid_Tests, tests.IrisTest):
-    target_class_name = 'Grid'
-
-    def setUp(self):
-        self.constructor_setup()
-
-
-class Test_ArakawaC(Mixin_ConstructorTest, Mixin_Grid_Tests, tests.IrisTest):
-    target_class_name = 'ArakawaC'
-
-    def setUp(self):
-        self.constructor_setup()
-
-
-class Test_ENDGame(Mixin_ConstructorTest, Mixin_Grid_Tests, tests.IrisTest):
-    target_class_name = 'ENDGame'
-
-    def setUp(self):
-        self.constructor_setup()
-
-
-class Test_NewDynamics(Mixin_ConstructorTest, Mixin_Grid_Tests,
-                       tests.IrisTest):
-    target_class_name = 'NewDynamics'
-
-    def setUp(self):
-        self.constructor_setup()
-
-
-class Test_FFHeader(Mixin_ConstructorTest, tests.IrisTest):
-    target_class_name = 'FFHeader'
-
-    @staticmethod
-    def dummy_constructor_call(self, filename, word_depth=12345):
-        # A replacement for the 'real' constructor call in the parent class.
-        # Used to check for correct args and kwargs in the call.
-        # Just record the call arguments in a global, for testing.
-        global constructor_calls_data
-        # It's global because in use, we do not have the right 'self' here.
-        # Note: as we append, it contains a full call history.
-        constructor_calls_data += [(filename, word_depth)]
-
-    def setUp(self):
-        self.constructor_setup()
-
-    def test__basic(self):
-        # Call with just a filename.
-        # NOTE: this ignores "our" constructor word_depth default, as the
-        # default is now re-implemented in the wrapper class definition.
-        self.check_call(['filename'], {},
-                        expected_result=('filename', 12345))
-
-    def test__word_depth(self):
-        # Call with a word-depth.
-        self.check_call(['filename'], {'word_depth': 4},
-                        expected_result=('filename', 4))
-
-    def test__badargs(self):
-        # Make sure we can catch a bad number of arguments.
-        with self.assertRaises(TypeError):
-            self.check_call([], {})
-
-    def test__badkey(self):
-        # Make sure we can catch an unrecognised keyword.
-        with self.assertRaises(TypeError):
-            self.check_call([], {'_bad_key': 1})
-
-
-class Test_FF2PP(Mixin_ConstructorTest, tests.IrisTest):
-    target_class_name = 'FF2PP'
-
-    @staticmethod
-    def dummy_constructor_call(self, filename, read_data=False,
-                               word_depth=12345):
-        # A replacement for the 'real' constructor call in the parent class.
-        # Used to check for correct args and kwargs in the call.
-        # Just record the call arguments in a global, for testing.
-        global constructor_calls_data
-        # It's global because in use, we do not have the right 'self' here.
-        # Note: as we append, it contains a full call history.
-        constructor_calls_data += [(filename, read_data, word_depth)]
-
-    def setUp(self):
-        self.constructor_setup()
-
-    def test__basic(self):
-        # Call with just a filename.
-        # NOTE: this ignores "our" constructor word_depth default, as the
-        # default is now re-implemented in the wrapper class definition.
-        self.check_call(['filename'], {},
-                        expected_result=('filename', False, 12345))
-
-    def test__read_data(self):
-        # Call with a word-depth.
-        self.check_call(['filename', True], {},
-                        expected_result=('filename', True, 12345))
-
-    def test__word_depth(self):
-        # Call with a word-depth keyword.
-        self.check_call(['filename'], {'word_depth': 4},
-                        expected_result=('filename', False, 4))
-
-    def test__badargs(self):
-        # Make sure we can catch a bad number of arguments.
-        with self.assertRaises(TypeError):
-            self.check_call([], {})
-
-    def test__badkey(self):
-        # Make sure we can catch an unrecognised keyword.
-        with self.assertRaises(TypeError):
-            self.check_call([], {'_bad_key': 1})
-
-
-if __name__ == "__main__":
-    tests.main()