I can confirm some of what Bat.man says.
I was on the 737 -200 (200,300 and 400 were one fleet with one fleet manager) when Dan was bought by BA.
The chief pilot at DAN just happened to be on the 737-200, but not Fleet Manager.
When a group of us on the 737-200 went to the Aer Lingus simulator to get our 737 EFIS rating which took 10 days and was paid for out of our redundancy money - guess who asked to join us- the old Chief Pilot. We assumed he was being given the push, like the rest of us on the 200 fleet, and was welcomed as a last minute addition to our little privately organised course. He signed the cheque and paid his share of the costs.
We subsequently found out that he had neatly moved across to become Chief Pilot at BA(EOG), as he was now 'qualified' on all the 737 types.