Justin Welby joins Instagram - Telegraph Managed by the Lambeth Palace press team, the account will also feature video messages and prayers from Archbishop Welby. Archbishop Welby is just the latest in a string of high profile names to join Instagram including Michelle Obama, Andy Murray and Paul McCartney, who has launched new music through the site. The app was launched three years ago by two Stanford students fed up with the poor quality of photos on their mobile phones and is now worth an estimated $1 billion. The Anglican leader's decision to join the social media site is yet another sign of his determination to reach wider audiences. In a personal letter being sent to all clergy, the Archbishop underlined his credit union message saying that the one million families who take out payday loans every month can end up in a crippling spiral of debt. He wrote: "Our faith in Christ calls us to love the poor and vulnerable with our actions. That is why the Church must be actively involved in supporting the development of real lending alternatives, such as credit unions. The drive to encourage responsible lending follows on from Archbishop Welby's outspoken criticism of payday loans company Wonga earlier this year, which left him red faced when it emerged the Church had financial interests in the firm. Churches round the country are supporting ICU Day, with bishops signing up to and supporting local credit unions, including a community credit union pop-up session in London. Revd Dr Malcolm Brown, director of the Church of England's mission and public affairs division said: "The credit union sector is extremely well placed to offer real choice about how people manage their money. Credit unions aren't just for hard pressed communities - all sorts of people could use credit unions to save and to take out loans at manageable interest rates. Archbishop Justin is calling on churches all over the country to work with their local credit unions - and the Church of England is working with the Church of Scotland so that our response runs, literally, from Lands End to John O'Groats.