I'm not even mentioning initials. Based on your experience you join the dots.
As for them taking people from turbo props, it would be on a flexicrew deal, there will be people stupid enough to do it, I don't recommend it and I strongly doubt it will happen. There isn't a shortage of people with upgradable hours in the company. Genuinely, if you want a career flying airliners in the uk, BA is the only option.