Change license for 4.3.1 (#20)

Files in the repo updated to reflect the change to the license for the 4.3.1 release

Author: paulc-dstl

LICENSE.md

@@ -1,5 +1,31 @@
-© Crown copyright (2023). 
+# License 
+Copyright © 2025 Crown Copyright.
 
-This information is licensed under the terms of the [Open Government Licence](http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/) except where otherwise stated. 
+Unless stated otherwise, the codebase is released under the [MIT License, Version 2.0](https://opensource.org/license/mit). This covers both the codebase and any sample code in the documentation.
 
-Code forming part of this repository is licensed under the terms of the [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0). 
+The documentation is © [Crown copyright](https://www.nationalarchives.gov.uk/information-management/re-using-public-sector-information/uk-government-licensing-framework/crown-copyright/) and available under the terms of the [Open Government Licence](http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/)
+
+## MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+## Source
+Licensing as per Government Digital Service (GDS) "The GDS Way": 
+
+https://gds-way.digital.cabinet-office.gov.uk/manuals/licensing.html