At the bottom expect plenty of weekend working. BWI, PHL, JED, TLV.
You'll also get to see NAS in the stormy season.
Are you familiar with how bidline works? Worth buying any BA mates from any the LHR fleets a beer for an hour or two of their time.
I left the fleet a year ago to get more seniority on a junior fleet (320) and hence control of days off.
If you have no mates already in BA then pm me.
Good luck