john hegley ?
this is possibly john hegley. certainly looked like him and sounded like him. but i'm not an expert on his appearance.
i may also have walked past john cleese but it could just have been any old chap with a moustache so was probably a false positive.
Was he talking in rhyming couplets? That would have clinched it.
I saw a John
But he said
I am French
Must have been a Gendarme
aha. the long (gend)arme of the law no doubt.