P45 versus preferential creditor - will unpaid salary be lost?

New topic I hope - if I have to leave my company because it is out of cash, but it has the potential to be sold in future, will signing on reduce my liklihood of being paid owed salary in future? As I understand it staff rank first in the list of preferential creditors, i.e. if money comes in staff are paid before other creditors, and shareholders are last to be paid.

I have 6 months unpaid salary for which the company is liable. By signing on now do I reduce my liklihood of getting that in future, i.e. do I just become a regular creditor of the company? Or can I get a letter from the company saying that I remain a preferential creditor, that I can get paid in due course as a preferred creditor, and pay appropriate tax at that time or in next tax return?

Best, and thanks for any advice.

PWR