Evidently not, though that's the only example I've seen of a Look-In ad shown on a weekday morning. Central liked to be different, but they stayed within the rules.
Look-In being published by ITV (wasn't it ITPA or similar?) meant it probably wasn't a paid-for ad any more than the 'Full details in TV Times' astons were sponsors, and in the same way Radio Times ads on the BBC weren't really 'ads'.
I assume the various publication annos during schools programmes ("Parents can obtain copies of the Let's Read with Basil Brush books from The Old Library in Margate" and the like) weren't seen as ads, as they were tv tie-in publications. Remember when Redvers used to promote Emmerdale Farm novels after the programme? As late as 1994, Carlton used to promote the Prisoner Cell Block H videocassettes after the episodes. I assume these 'pub annos' were regarded differently to ads, and the ITV company wasn't paid to promote the products? I can see a difference between a pub anno for Emmerdale books, which were published by YTV, and Prisoner videos whose publisher/distributor wasn't linked in any way to ITV or Carlton. Though legally, perhaps there wasn't a difference?
In London as well as TV Times and Look In, you had Capital FM, Capital Gold and Oracle ads which didn't count either. Don't remember any LBC ones though!