Hi Paul,
You can add glyphicons using the images page that comes with the first module in your project.
In the top bar is where you can click new and import them from your computer
Heres a link to a site where I get most of my custom glyphicons
https://www.flaticon.com/
Thanks, that's what I've ended up doing but they tend to look awful if I need to enlarge them etc. There seems to be a way to do it using a font file and classes but not enough info around for me to get it working.