Yes @Catwith69lives , especially if they had a poster with his face on it up, which seems highly likely!
I'm more and more inclined to think that this is not so much a running "gag" as an invitation to worship at the shrine of Timmoth's "charisma". He's so marvellous that he has old ladies giggling, foodstuffs are pressed upon him, he enthralls the populace of St Ives with his rendition of Beowulf, he may as well be a respected poet because he's so wonderful, no surprise people mistake him for one (even though he bears not the slightest physical resemblance)
Salray hero worships him in a way that is most unusual for a long marriage and even Jason Isaacs seems to have been entranced, so he's clearly got something.
I've told this story elsewhere so apologies. One of my old university lecturers was in Jerusalem in the early 60s for study. He knew Oskar Schindler, he said slightly. He first met him at a party where an very ordinary man, a bit shabby and no longer young walked in and within 5 minutes, without doing anything to draw attention to himself, he was surrounded by people, including pretty young women, all hanging off his every word. My tutor said at that time few people knew who he was and what he had done, so it wasn't that. He also said he was the most charismatic human being he ever met and "the air changed" when OS came into a room.
Funny thing, I suppose such magnetism can be used for good or ill or nothing much in particular, it just "is", although I think in Timmoth's case it is more studied in the way he presents himself.