I have to hold my hands up and say it looks like I got it wrong about Lovelady on a box.
The picture I used to compare Lovelady with the mystery man shows Lovelady with a really sloping forehead and a completely different hairline.
I just assumed the guy pictured outside the TSBD building was Lovelady because of the shirt.
However, I came across a mugshot of Lovelady which shows a completely different profile and, when rotated slightly, is a really good match for the mystery man.
It was an honest mistake, made because I assumed the guy in the Martin and Hughes films was Lovelady. Now I'm not so sure.