Newbie... I suspect I may be doing something very stupid.Thank you in advance for your patience. Piers.
Hello, Welcome here.\version "2.16.2" indicates that you are using an old version of LilyPond. Everything seems fine over here with version 2.20.0. Attached is the output.
LilyPond 2.20 may be downloaded from here: https://lilypond.org/download.html Best regards, Jean
Bar types (cropped).pdf
Description: Adobe PDF document
