Talks in Cambridge, UK, are often advertised at https://talks.cam.ac.uk and are open to the public. Quite a few are both in person and over zoom. From my circles:
Areas of particular interest include developing and applying high-density image acquisition methods (electron, X-ray, light) to determine the structure, connectivity and function of intact nervous systems at synaptic resolution; bringing brain-scale connectomics to additional species (including vertebrates); experimental approaches that leverage connectomes to understand brain function; and computational analyses essential for research across these areas.