The novelization of “The Daleks” omits the events of “An Unearthly Child”, giving an alternate opening, which leads directly into landing on Skaro.
The film “Dr Who & the Daleks”, a remake of the original serial, also omits the trip to the past, going straight to skaro.
There weren’t really any repeats of old serials in those days, and Doctor Who Magzine didn’t start till the 70s. Fans of Doctor Who must’ve thought for years that the trip to the 100.000 BC never even happened!
Also worth noting is that in both the film and the novelisation Barbara and Ian are explicitly romantically involved, as opposed to the show, where its more open to interpretation.
So again, some viewers must’ve been convinced that they were explicitly a couple.