In caption one, Mr Baxendale has added a "Buy Wham" banner, making it look like someone from Wham! has sneaked into the strip via the drain to advertise their comic.
I know comics like Tammy self advertise a lot by having their characters read Tammy especially on the front pages, but the Bad Penny example is advertising a different comic than the strip is in. Although subjective, I think he got a free advert for Wham! in the strip!!
I know they were sister comics in which Mr Baxendale had connections with both, but I would think this is a rare example of the heading, or is it?
