This is a port of the perl module Geo::Coordinates::OSTN02 by Toby Thurston (c) 2008. See example.py for typical coordinate transforms.
Toby kindly allowed his code to be used for any purpose.
The python port for v2.7 and v3.0+ is (c) 2010-2017 Tim Sheerman-Chase
The OSTN02 transform is Crown Copyright (C) 2002
See COPYING for redistribution terms (BSD license)