MotD2 showed it perfectly last night. They showed an image from behind the goal with Rashford taken out. Said it was clear as day that Ederson does what he has done a million times before and gets to that ball and clears it if it's only Fernandes going through. The fact that he's staring at Rashford at all times prevents him from doing this. Also showed that Akanji and Walker both altered their runs to accomodate Rashford. Shearer was trying to hide behind the wording of the laws of the game but even dipper Dan said there's enough in them to rule that as an offside.