I did this in 2017...titled 'Prince Philip winding down from Public Engagements'.
70cm x 50cm cheap canvas.
The copper coloured background over the Union Jack reflects very nicely
when viewed in certain light.
I have often been tempted to paint over it, recycle the canvas....but now
I am glad I never did.
I am thinking about mailing it to my local Castle (Windsor) asking them to
archive it.....the worst that could happen is that they send it back, I guess.