Amazon has a scheme whereby charities can sign up and when people shop on Amazon through their smile.amazon.co.uk portal and buy certain goods Amazon will donate 0.5% of the price to their selected charity. This is at no cost to the charity and no cost to the customer.
Money is donated by direct bank transfer once a quarter so there are no cheques to worry about. All charities need to do is to tell all their supporters to remember them when they shop online at Amazon. For more information see https://org.amazon.co.uk.