I figured that with Martha appearing in Series 2, they would have to do something like this.
They had made an effort to keep the shows separate, but with a WHO companion appearing, I can’t see as they had any choice but to do this. Although, I suppose this means that series 2 won’t have any episodes where the adult content drives the plot (like series 1’s “Day One” and its sex-driven alien) — otherwise the edited version would be about 12 minutes long!