Playing around today, I came upon an obvious/clever idea. A bit of hacking in Inkscape led to this. Note the crown, font and colors (don’t sue me, Trustees!)…
For those interested I’ve uploaded PDF (if you want to print or have a larger copy or something) and SVG (if you want to modify) files. It’s in the original size/aspect ratio for the Keep Calm and Carry On posters, 19¾ x 29½. Anyone is welcome to use it – if you’re feeling generous you’re welcome to cite me.