First let me say my experience with A-L current has been good apart from at the start when I didn't realise that their "Switching Service" could not be left to them without keeping a watching brief - relax we'll do it all is not helpful when various things went wrong and A-L said "We can't sort it out... Data Protection Act.
Having said that A-L say
"If you find yourself in financial difficulties, you should let us know as soon as possible so we can discuss with you the best way to help you overcome your difficulties."
Did you approach them and, from what you are saying negotiate a modest overdraft?
You talk about DDs being paid first and then credits - I've had that, in principle, but it's been on the same day when I have gone into the red but A-L say not to worry it's the running balance and as long as that matches up before bank closure no problem and I've never had one.
You say as a shareholder... probably have a lot to lose... I don't understand as A-L is now part of Santander, one of the world's largest banks.
Sadly, in my view, all large companies are amoral and worse but what is your evidence for saying their banking practices are fraudulent?
The penultimate paragraph tells a horror story but the real villain of the piece is DWP.
Good and bad has been written of A-L on this forum over the years and by the nature of forums there has been rather more bad than good.
I don't mean this thread to be a defence of A-L but my experience has been good and when I have had a problem telephone banking has been quite satisfactory. I think the branches are good for one thing the suped up ATMs which allow me to pay in the occasional cheque without waiting in line for a teller.