Have applied to BA three times. Got to the FB. In each application it was pretty much the same stuff. The difference being changes to info relevant to BA, such as economics, strategy, routes, aircraft etc. Most especially ECONOMICS though. Have now grown old and bald (nearly) and decided to do all the training myself, only for BA wanting me to re-apply again !! Don't increase your hours too much and talk to people such as the Air League. Having one of their sponsorships could help.