The Royal Society is a brilliant organisation supporting researchers from a wide variety of fields. Through them, you can access awards, events, career development resources and multiple grants. Their website has a handy search tool showing you their currently open grants. As well as the usual research and collaboration grants, the Royal Society has some great grants for developing outreach and public engagement projects.
Opening and closing dates vary, but many of these grants are recurring so pick a few and keep an eye out for the next funding round!