Hi Leo,
Thanks for your incredibly quick reply. I had tried: Appearance > Customise > Layout > Sidebars, but that didn’t help.
However, I’ve now tried your suggestion, and I get as far as: Appearance > Customise > Typography, but when that opens I do not get a further option for ‘widgets’. It only shows something called ‘System Stack’, with the ability to change fonts etc.
I am using the latest version of GP Premium.
Any suggestions? Thanks again for your help so far.