Do not leave BA before you get a command. All you’ll be doing is joining the bottom of somebody else’s list and anything can happen while you’re waiting. Jet2 love DEC’s so you run the risk of becoming seriously miffed if they keep flooding in while you’re waiting. I know a few guys who are or have been Jet2 in BFS. It’s pretty lucrative and they get left alone but last I hear there was a queue now although near a big as the one at Easyjet. DEC transfers have taken 1-2 years and FO’s transfer out for command unless you’re really lucky..but I’m not J2 so let them confirm the detail. Seriously though..do not leave BA without a short haul command. You could end up in the wrong place in the wrong seat in the event of a downturn and then your current job will look like utopia.