Another challenging missive from my North Wales correspondent.
Dear Boris Johnson, she writes, I was intriguated by your little piece about grammar. Mr Trellis, my late husband, was always most particulous about where he put his prepositions. I remember him struggling with the sentence: What are you up to? He changed it to:To what are you up?
And then he tried: Up to what are you? before giving up in desparity and going back to his shed.
I am sure you don't have such problems, you being a pubic school toff and all. By the way, I like your hair all wild and unkept: you could almost be Welsh.