Revealing mistake: Episode aired 06/05/2016. Steve (Ronnie's stalker) pulls out a folder of newspaper clippings concerning Ronnie's baby-swap case. It shows up close an "article" which is seemingly legit when reading the first few lines...only to show the same sentence repeatedly, merely the information having been rephrased. Either the Eastenders-verse bears some rather incompetent and careless journalists, or the writers of the soap were simply too much too bone-idle to write up even the most mediocre of articles.
Revealing mistake: Episode Aired 12th December. In the laundrette a shelf had fallen off the wall and Dot Cotton needed someone to fix it. You could see the wall was false, as every time Dot touched the shelf, the wall was wobbling. Later same episode Martin Fowler fixed the shelf he said something like "the wall will fall down before the shelf does" - very true.