I had occasion this week to refer an organisation to the Directory of Social Change (“dsc”) who publish a wide range of very helpful resources and run some great course for small charities. The enquiry was about training to help make grant applications more successful, but their syllabus’s cover all the fundraising areas.
You may know them as publishers of the annual Directory of Grant Making Trusts but they offer much more, so why not have a look at https://www.dsc.org.uk/