Pay?
Peasacake
If my pay cheque didn't make my bank account as expected, then I'd want to know why (and PDQ at at that). That's one breach of contract (assuming I had served my probationary period)
If the Company apears to have cash-flow problems, but chooses not to keep me in the picture, so that I may take a considered view on the situation, then the next time I am not paid on time I'll walk. There is no 3rd strike.
So a 90 day notice period is purely academic; have you ever tried to buy groceries form Sainsbury's with the line "It's OK, I'll be paid next week, so no worries"?
And as the old adage has it, if you think you don't have enough paperwork to keep you going, try missing a mortgage payment................
It's real world we all have to live in _ VFR