In both the Phantom F4 and Tornado F3 it was common place for a formation to use their AI radar to follow the leader whilst he performed a GCA
I feel that I ought to point out on behalf of the WIWOLs here that this procedure was an SOP in the Lightning force well before the advent of the F4 and Tornado F3 albeit for pairs only. I doubt that any authorisers would condone launching a 4-ship with Y2/Amber forecast bearing in mind the Lightning's paucity of fuel.