Nite_Flight,
The pay scale that I posted above is the pay scale you would receive (unless I have made some errors, always possible I'm afraid).
And you asked, <Would one get seniority below Cityflyer pilots?>
The answer is of course yes. What else would you expect as Cityflyer pilots are BA pilots; when or if you join, you join at the very bottom of the list. That is true whatever your background or experience, civil or military.
Regards
exeng