Islamic charities and banks provide alternatives to traditional UK contracts and loans that involve riba, or interest, which is prohibited under Islamic law. Options like ijara with diminishing musharaka allow Muslims to purchase homes through installment plans where payments cover rent and gradually purchase portions of the property. Fully Islamic banks also offer halal financial products like current accounts, business accounts, home financing, and annuities that are approved by Sharia'a committees to be in compliance with Islamic principles.