tbf, back in the "glory" days, with 29m watching Morecambe and Wise, there was virtually fuck all else to do of an evening, than watch tele with the nuclear family.
And in all probability, nowhere 29m did watch it.*
*ex gf's dad was one of the thousand (yeah, singular) who completed the forms to detail everything they watched. In return they got free tickets to many BBC shows and productions. Funnily enough they got more tickets the more they "watched" the BBC programs. Or vice versa.