Hi Alasdair: I haven't had much luck with ESS and emacs 27 (although my issues are different).
Can you try emacs 26? -- Rodney Sparapani, Associate Professor of Biostatistics Chair ISBA Section on Biostatistics and Pharmaceutical Statistics Institute for Health and Equity, Division of Biostatistics Medical College of Wisconsin, Milwaukee Campus ______________________________________________ ESS-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/ess-help