Ohh god - the dreaded Mixed Fighter Force (MFF). Everyone hated it. The F3 either accelerated and left them behind or had to slow down for them. They weren’t any use BVR and the F3s didn’t want to go the merge.
Only real use, as with the Hunters, was point CAP at the airfields. So they were given to ATC and spent their time on deckchairs on the ORP at RS2 to scramble for cover airfield attacks,