Shadwell
You should well know that captaincy is about experience, knowledge and airmanship - that's why ISK have a good share of WSO capts. Most importantly, captaincy, amongst other things, is facing the Boss and Stn Cdr if you screw up - they don't send for the Lead Wet or P2
As a back end capt twice, I had my share of incidents - each time I quite simply stated on crew intercom, " P1 - capt, you are to RTB and get us there as quickly and safely as possible"
I also read and signed the F700, usually after everyone with an interest had seen it - I also ensured any crew member who had entered a snag, gave a face to face de-brief to the respective ground trade before vacating for the bus
Worked quite well