The u3a Trust offers various events and talks (covering a range of subjects) online for members. These are usually free. Find out more at https://www.u3a.org.uk/events/educational-events
If you would like to receive the u3a National Newsletter, you can sign up here: https://www.u3a.org.uk/newsletter
On June 2nd, there is a “u3a Day” to raise the profile of the u3a nationally and locally. You can find out more at https://www.u3a.org.uk/events/u3a-day