Can't say I agree with your take on this GM. Commercial property loans typically require a 20-25% deposit and rent should be at least 130% of loan cost. For SLH it was a 100% loan and the "rent" came from within the same parent company - we were what would now be called "Sub-Prime" in terms of commercial property "mortgages"! Commerical property mortgages typically ranged from 1-5% over BoE base rate at that time (*), and at the time the base rate was 5.75%, so I think 8.35% was actually pretty good given our situation. Also, we offset the £560k against the loan so it's amortised over 25 years, and we also negotiated a capital repayment holiday of 1 year.
The original loans with Fortis and DG Bank were 10 year floating rate notes for £17m - nobody wants to run a cash-critical business on a floating rate do they? Far far easier to budget with a fixed rate - if they want to take a mix of fixed/floating they can always take out an Interest Rate Swap but why would they want to other than taking a punt on short-term rates? I don't think it makes that much sense, especially as we have floating rate exposure in the other loan.
As far as the short-term interest rates go, well yes they are low at the moment if you simply look at the BoE Base Rate, but that's not overly relevant unless you are lucky and have a genuine base-rate tracker - the real rate that matters is 3 month LIBOR which is at 5.84%, which is pretty much where we were when they first took that loan out (LIBOR was 5.75% at the start of 2001). Also many commercial loans based upon BoE rate have caps and floors on the rate range so no guarantee it would go much lower, and floating rates are usually negotiated on shorter terms - we would not want to be trying to renegotiate our debt in this market, we would be absolutely crucified.
(*) At that time LIBOR was only 20-30bps over BoE base rate - nowadays, as mentioned above, LIBOR is incredibly higher, a full 284bps - and it's the LIBOR rate which is important, so 1-5% over BoE rates then is more like 3-7% over BoE rates now given credit conditions.
PS. If our short-term floating rate loan is with Barclays, you'll find they usually have small print to the effect that they don't use BoE base rate at all but rather the "Barclays Base Rate" which is not guaranteed to be the same... there's always a way out for the banks!