Dear colleagues, Please consider joining us for a hybrid planetary science workshop <https://www.geolsoc.org.uk/24-Planetary-Workshop> aiming to tackle the unknown questions surrounding the CM chondrite parent bodies, led by Dr Martin Suttle of the Open University. The workshop will be based at the Geological Society of London <https://www.geolsoc.org.uk/Events/Venue-Hire/Our-spaces> (remote participation available), over two non-consecutive meeting days: 12 July 2024 and 24 January 2025. Research focus: The microanalysis of CM meteorites (and CM-like micrometeorites) has led to significant progress in our understanding of the CM chondrite group, with particular attention directed towards their accretionary properties and parent body alteration history. By contrast, the larger-scale properties of the group, including the number of first-generation accretionary parent bodies, as well as their size and the internal structure remain poorly constrained. This Geological Society of London (GSL) planetary workshop aims to bring together researchers from across the UK (and further afield) who are interested in addressing these key unknowns. Through collaborative research using a mixture of sample analysis, numerical modelling and/or experimentation we intend to provide new quantitative constraints on the number and large-scale structure of the CM chondrite parent body (or bodies). The aims of the workshop are to act as a catalyst for early solar system research collaboration, to progress our understanding of the large-scale structure of carbonaceous chondrite planetesimals, and to generate one or more focused peer-reviewed publications to be published in the Journal of the Geological Society of London <https://www.geolsoc.org.uk/jgs>. Potential applicants are asked to provide an anonymised statement of interest in the workshop via email to science@geolsoc.org.uk by the closing date: 10 April 24. More information on the workshop can be found here <https://www.geolsoc.org.uk/24-Planetary-Workshop>. Many thanks, Team Planetary Science The Geological Society of London