diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 085c8746..00000000
--- a/.travis.yml
+++ /dev/null
@@ -1,120 +0,0 @@
-language: minimal
-dist: xenial
-
-env:
-  matrix:
-    - PYTHON_VERSION=36 IRIS_SOURCE=master
-    - PYTHON_VERSION=37 IRIS_SOURCE=master
-    - PYTHON_VERSION=36 IRIS_SOURCE=release
-    - PYTHON_VERSION=37 IRIS_SOURCE=release
-
-install:
-  # Download iris-test-data
-  # -----------------------------------
-  - >
-    export IRIS_TEST_DATA_REF="https://github.com/SciTools/iris-test-data/archive/master.zip";
-    export IRIS_TEST_DATA_DOWNLOAD="${HOME}/iris-test-data";
-    mkdir ${IRIS_TEST_DATA_DOWNLOAD};
-    wget -O ${IRIS_TEST_DATA_DOWNLOAD}/iris-test-data.zip ${IRIS_TEST_DATA_REF};
-    unzip -q ${IRIS_TEST_DATA_DOWNLOAD}/iris-test-data.zip -d ${IRIS_TEST_DATA_DOWNLOAD};
-    export IRIS_TEST_DATA_PATH=${IRIS_TEST_DATA_DOWNLOAD}/iris-test-data-master/test_data
-
-  # Install miniconda
-  # -----------------
-  - >
-    echo "Installing miniconda";
-    export CONDA_BASE="https://repo.continuum.io/miniconda/Miniconda";
-    wget --quiet ${CONDA_BASE}3-latest-Linux-x86_64.sh -O miniconda.sh;
-    bash miniconda.sh -b -p ${HOME}/miniconda;
-    export PATH="${HOME}/miniconda/bin:${PATH}";
-
-  # Create the test environment
-  # ---------------------------
-  - >
-    echo "Creating testing environment";
-    conda config --set always_yes yes --set changeps1 no;
-    conda config --set show_channel_urls True;
-    conda config --add channels conda-forge;
-    conda update --quiet conda;
-
-  # Get environment spec.
-  - >
-    export ENV_NAME="iris-grib-dev";
-    export ENV_FILE="${TRAVIS_BUILD_DIR}/requirements/ci/py${PYTHON_VERSION}.yml";
-
-  # Optionally download latest Iris master, from the github repo,
-  # and replace the Iris dependency with Iris' underlying dependencies.
-  - >
-    if [[ "${IRIS_SOURCE}" == "master" ]]; then
-      IRIS_REF="https://github.com/SciTools/iris/archive/master.zip";
-      export IRIS_LOCATION="${HOME}/iris";
-      mkdir ${IRIS_LOCATION};
-      wget -O ${IRIS_LOCATION}/iris.zip ${IRIS_REF};
-      unzip -q ${IRIS_LOCATION}/iris.zip -d ${IRIS_LOCATION};
-
-      IRIS_ENV_FILE="${IRIS_LOCATION}/iris-master/requirements/ci/py${PYTHON_VERSION}.yml";
-      sed -i "/- iris/d" ${ENV_FILE};
-      echo "# IRIS DEPENDENCIES." >> ${ENV_FILE};
-      sed -ne "/dependencies:/,$ p" ${IRIS_ENV_FILE} | sed "1d" >> ${ENV_FILE};
-    fi;
-
-  # Create environment.
-  - >
-    conda env create --quiet --file=${ENV_FILE};
-    source activate ${ENV_NAME};
-
-  # Check installation of eccodes.
-  - python -m eccodes selfcheck;
-
-  # Install pip, then coveralls.
-  - conda install --quiet pip;
-  - pip install coveralls;
-
-  # Output environment debug info.
-  - >
-    conda list -n ${ENV_NAME};
-    conda info -a;
-
-  # Configure Iris
-  # --------------
-  - echo "Configuring Iris";
-
-  # Optionally install latest Iris master, from downloaded source.
-  - >
-    if [[ "${IRIS_SOURCE}" == "master" ]]; then
-      cd ${IRIS_LOCATION}/iris-master;
-      python setup.py --quiet install;
-    fi;
-
-  # Locate Iris installation.
-  - export IRIS_DIR=$(python -c "import iris; import os.path; print(os.path.dirname(iris.__file__))")
-
-  # Set iris config paths.
-  - >
-    export PREFIX="${HOME}/miniconda/envs/${ENV_NAME}";
-    SITE_CFG="${IRIS_DIR}/etc/site.cfg";
-    echo "[Resources]" > ${SITE_CFG};
-    echo "test_data_dir = ${IRIS_TEST_DATA_PATH}" >> ${SITE_CFG};
-    echo "[System]" >> ${SITE_CFG};
-    echo "udunits2_path = ${PREFIX}/lib/libudunits2.so" >> ${SITE_CFG};
-
-  # Install iris-grib itself
-  # ------------------------
-  - >
-    echo "Installing Iris-grib.";
-    cd ${TRAVIS_BUILD_DIR};
-    pip install . --no-deps;
-
-  # Summarise the environment
-  # -------------------------
-  - >
-    conda list -n ${ENV_NAME};
-    conda list -n ${ENV_NAME} --explicit;
-    conda info -a;
-
-script:
-  # Ensure we can import iris_grib and that the tests pass
-  # ------------------------------------------------------
-  - coverage run setup.py test
-
-after_success: coveralls
diff --git a/noxfile.py b/noxfile.py
index a8ea6532..81bd7b95 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -103,7 +103,7 @@ def _session_lockfile(session: nox.sessions.Session) -> Path:
 
     """
     lockfile_name = f"py{session.python.replace('.', '')}-linux-64.lock"
-    return Path("requirements/ci/nox.lock") / lockfile_name
+    return Path("requirements/locks") / lockfile_name
 
 
 def _file_content(file_path: Path) -> str:
diff --git a/requirements/ci/iris-grib.yml b/requirements/iris-grib.yml
similarity index 100%
rename from requirements/ci/iris-grib.yml
rename to requirements/iris-grib.yml
diff --git a/requirements/ci/nox.lock/py38-linux-64.lock b/requirements/locks/py38-linux-64.lock
similarity index 100%
rename from requirements/ci/nox.lock/py38-linux-64.lock
rename to requirements/locks/py38-linux-64.lock
diff --git a/requirements/ci/py38.yml b/requirements/py38.yml
similarity index 100%
rename from requirements/ci/py38.yml
rename to requirements/py38.yml
diff --git a/requirements/ci/readthedocs.yml b/requirements/readthedocs.yml
similarity index 100%
rename from requirements/ci/readthedocs.yml
rename to requirements/readthedocs.yml