If you have even modest savings stored in a bank account in the medium-to-long term it could be better to invest it in a Christian charity, paying you a competitive rate of return and being used for charitable purposes.
Hope into Action is a Christian charity partnering with investors and churches to house the homeless. Investors can participate in house ownership, whilst a local church charity provides the support for individuals to get back on their feet. Several people in Cherry Hinton have invested savings with Hope into Action. Talk to Chris Tanton as a Hope into Action supporter if you are interested in finding out more. The minimum investment is £5,000 and there is no maximum, they aim to give a 2% return on your investment per year. The ideal is for a group of people to invest in one house jointly to support a particular ministry: https://www.hopeintoaction.org.uk/investinahome
Green Pastures owns properties to enable Christian ministry. To expand the number of properties and impact, up to 5% interest is offered to individual investors on unsecured loans. The minimum investment is £1,000 and there is no maximum: https://www.greenpastures.net/invest
Stewardship services has a vision “For the world to encounter Jesus through the generosity of his church”. The resources they offer churches are numerous including banking, charity formation, a payroll bureau and accounts examination. A new venture is to engage with individuals to invest in loans to churches to achieve “financial, social, and spiritual financial returns”: https://www.stewardship.org.uk/social-impact-investing