Sir Billy Butlin died in 1980, and Butlin's introduced us to a new catchphrase: "Butlin it Once and You'll do it Again". On YouTube, I've found a clip of the Christmas 1980 episode of Crossroads, complete with commercial break.
At the motel, Meg was having a disco, and at the Brownlows' Arthur set the table cloth on fire (?!). The new Butlin's commercial, complete with the "Butlin it Once and You'll do it Again" ditty lights up the break, together with an advertisement for an indigestion remedy featuring a Space Invaders style turkey.
1980 was a different planet.