at ba ur seniority number is diff to ur staff number.
ur sen num is allocated to you when u start and it is ur nmber within the company, the person that has been there the longest being number one, and the newest person being xxxxxx any new entrants at ba will have a seniority number of aroun 14000
ur seniority number is used when deciding who gets what leave, who works where on the aircraft, who gets what trips ect (at lgw), and most importantly at ba who gets part time and fleet transfers first.
this way the person wo has worked for ba the longest can get what they want before a new person