Here’s Boris Johnson’s signature. He hasn’t sent a letter to Notre Dame (that I know of).
The main thing I notice about this isn’t the signature itself but that he hasn’t bothered to write ‘sincerely’ correctly. Now I’m not a graphologist but this seems to sum up Boris Johnson’s character for me.
You can’t believe anything he says without other independent facts.
What will be the result on the 12th of December? Who knows.