I wish you hadn't mentioned Spitting Image. It got me remembering the two Davids (David Owen with David Steele in his pocket) and asking myself if is they would portray Trump and Johnson as conjoined twins - then the imagery got worse when I remember what Johnson was slang for - Trump with a talking Johnson in his trousers. Surprised that Steve Bell hasn't picked up on this - I suppose the imagery would be too much even for the Guardian.