Scroggs, you're spot on about DofE, do it if you fancy it.
All this "DofE is a must" is absolute rubbish.
You'll get the job if you show some natural ability in the sim and can get on with the people interviewing you. (including answering a few standard questions from HR, strengths, weaknesses etc.)
All this c**p about "do this and that because it shows leadership / character development" etc is misleading. You'll need some decent grades to get into the interview room but once there it's as I said above.
There's no secret formula to get into this industry, just be a decent bloke / lass, not up your own ass, not a shrinking violet and you'll get the job. Same as any job surely - OK maybe not Fame Acadamy.
Clearly, thinking that you should get a job simply because you've done DofE etc etc is a mistake and shows character flaws I would say.
Disregard all of the above if applying to BA.