Update README

README.md

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 # University of Bristol presentation theme based on the PowerPoint template
 
-This is a LaTeX Beamer theme based on the 2018 University of Bristol brand guidelines. It can be used with `pdflatex` and `lualatex`, though for the best results use `lualatex`. (It probably works with `xetex` as well with some very minor changes.)
+This is a LaTeX Beamer theme based on the 2024 University of Bristol brand guidelines. It can be used with `pdflatex` and `lualatex`, though for the best results use `lualatex`. (It probably works with `xetex` as well with some very minor changes.)
 
 When used with `lualatex` it uses Rockwell and Arial as the primary fonts (you might need to install them separately). If you use `pdflatex` then Concrete and Helvetica are used as the closest alternatives.
 
 See `example-slides.pdf` for example slides and `example-handout.pdf` for an example handout.
 
-Copyright (c) 2012, 2020, David A.W. Barton (david.barton@bristol.ac.uk)
+Copyright (c) 2012, 2020, 2024 David A.W. Barton (david.barton@bristol.ac.uk)
 All rights reserved.
 
 The latest version of this theme can be found on