If you haven’t looked at the SOFII website for a while, I encourage you to do so.
SOFII stands for ‘Showcase Of Fundraising Innovation and Inspiration’ and they are themselves a non-profit, with the aim of sharing best fundraising practice from the UK and around the world. Their website https://sofii.org/ is packed with useful ideas, so please do take a look. You can also contribute your own ideas, to give them a wider audience.