BBVA is very different from the LEA/student loans company - it is purely commercial and assuming the rumours surrounding what BA intend doing are correct would be unsecured, meaning that your only concern should be whether you can afford the repayments.
I might humbly suggest two things at this time :
1/ Wait until the scheme details are announced before you start deciding whether you can or can not afford it - or whether the first batch is the one to go for.
2/ Consider that you do not have to do this now, now, now. At risk of sounding REALLY old, over the last twenty years this country has become about "wanting it now and hang the future". You've just discovered ONE of the problems of this approach. Consider what opportunities getting into even more debt at this point might preclude you from downstream and then weigh up against whether perhaps working for a couple of years, clearing the student debt at least - and perhaps funding a portion of your flight training before going for this scheme might be a decent alternative.
I'm not saying you shouldn't go for it - Just "consider" it. You should be able to already see the drawback of debt and how it stops you doing things. Consider £85k of debt....