In 2004 Michael Harvey gave up a high-flying job in the City of London to teach church leaders to see new possibilities, using an approach that has quickly become established as Back to Church Sunday. Now through his Unlocking the Growth Seminars Michael likes to challenge churches of all sizes to double their congregation in a day. In 2010 at least 80,000 new people came to church in Britain through this approach, with around 10,000 becoming being added to the church. Over the past 12 months he has travelled to five continents and helped to establish the practice of invitation across 17 countries.