At the climax of Star Wars: Episode IV – A New Hope, Red Squadron is the group of X-wing pilots part of the attack on the Death Star.
At the start of the attack the pilots report their status:
Red Leader: All wings report in.
Red Ten: Red Ten standing by.
Red Seven: Red Seven standing by.
Biggs Darklighter: Red Three standing by.
Porkins: Red Six standing by.
Red Nine: Red Nine standing by.
Wedge Antilles: Red Two standing by.
Red Eleven: Red Eleven standing by.
Luke Skywalker: Red Five standing by.
Red Leader: Lock S-foils in attack position.
Now we already know why the pilots report in out of order and why Luke is "Red Five". However, reading through the list again I notice that Red Four and Red Eight do not report in. Why is this; were they lost during the Battle of Scarif and not replaced before the Battle of Yavin, were they unable to fly the mission for some other reason, was it an editing/production decision?
Was there a Red Four and Red Eight and if so, where were they during the Battle of Yavin?