I agree with you, I was answering Xhavenjoe who said the ref had missed the flag.More fool them, you play to the whistle not the flag. The ref is not obliged to stop play if the assistant flags - in this case the ref was quite correct to let play continue as the attack was continuing. Sian Massey made an error by raising the flag too soon, unusually because she's one of the better assistants.
BUT my point, as this is the VAR thread, you cannot have 3 officials and VAR as it leads to these cock ups.