Easaman, BA cannot hand out licences the CAA does. I think you are getting confused that they were issued B1 company codes even though the A+P covers no electrics.
I hope the suggestion of Manuals inside the flight deck brings with it a padlock!
I hate Pilots trying to catch you out with technical when you walk on to the Flight deck.
Its pretty blatant the defect has been discussed extensively throughout the flight having given an FCOM system refresher course to each other during the sector!
A TSM/FIM in there would be a nightmare.