In 2014 Paul and Isolde James-Griffiths launched out and pioneered Christian Heritage Edinburgh, with the motto: "Challenging today from the past".

When they moved from London to Edinburgh in 2004, it soon became apparent to them that Edinburgh has an extraordinary Christian history that has shaped Scotland and the world. They noticed that most of the walking tours in the city’s Old Town focused on ghosts and witches, and whatever content there was about the Christian faith in general tours tended to be negative. They sensed strongly that the real Christian story needed to be told, so they pioneered the Celtic Tour, which has now become the Christian Heritage Tour, which is part of their charitable business called Soul of Scotland Tours.

Out this grew the Christian Heritage Centre, which at first attracted over 10,000 visitors in the summer, but before the March 2020 Covid lockdown attracted almost double that. Teams of Christians, from interdenominational gospel churches, work with them to reach thousands of people from all over the world with the message of Christ. Besides this they run Street Café teams that reach university students, night clubbers, and the general local population of Edinburgh, as well as tourists. They also run an Evangelism Course and produce resources for mission and Christian history.