I was thinking about this while cooking.
If Ratcliffe doesn't repay our current debt (and I'm not talking about new debt he's said he'll put on INEOS), it'll have to be refinanced at some point.
Now I am not familiar with our debt profile but suffice to say it's been financed in a period of time where we've had historically low interest rates and very cheap financing. For example, we took our latest tranche of £100m at the start of Corona which was just about the best timing. I'd assume it's in the 2% to 4%, giving us the 20m or so annual interest repayment.
Current rates in the US (which is the finance capital of the world and where we draw finance, hence why the debt has been going up in £ terms because it's denominated in USD) are just under 5% and projected to go to 6%. Now, this is the base rate and I'd assume we'd be paying close to 10% once our debt is due to be refinanced.
Of course, it won't happen all at once and we can be prepared to refinance less but if we assume 600m debt at 10%, that's a nice 60m we'd pay just in interest a year and any capital repayment on top of that. We're literally talking about debt as big as our revenue.
Our headroom is anywhere between 100 to 200m a year, so 50/60m would mean we'd be very much constrained. You might have noticed I haven't even mentioned stadium costs and transfers, so make up your mind where we'd be if we don't get the cash injection of about 2bn to clear the debt and start building the stadium.