Where not otherwise covered by separate copyright, this source code is Crown Copyright (c) 2010, 2011, 2012, 2013, 2014
Excel model, this wiki, documentation
Where not otherwise covered by a separate licence, this material is published under (and subject to the terms of) the Open Government Licence. http://www.nationalarchives.gov.uk/doc/open-government-licence/version/2/
Source Code
Where not otherwise covered by a separate licence, the source code to the 2050 calculator is distributed under the MIT licence: http://www.opensource.org/licenses/mit-license.php