So, despite the confidentiality agreement. the financial story of the transfer is starting to appear - including a possible explanation of why Spurs (off the record) said 100m Euros and Madrid (off the record) say 91m and why both may be telling the truth.
The following is speculative but may interest some sad souls interested in how businesses move big money.
The Euro MP who accused them of borrowing the money from Bankia, and by extension from European taxpapers, has provoked some of the financiers etc to start putting their side. It's summarised here:
http://futbol.as.com/futbol/2013/09/04/primera/1378321005_631768.html
I await Swiss Ramble or someone similar explaining it, hopefully after some more details dribble out.
Meanwhile, what I'm told by my corporate law "friend" (OK - enemy given how much he was laughing at us last week) who has been reading around the subject, is something like. Madrid are paying 16m Euros now, followed by three further installments. Banco Santander are acting as guarantors for the 2014/5/6 payments - not actually handing over money in a loan. Madrid are using TV money as collateral for the guarantees.
Spurs are getting a payment using those guarantees - from Deutsche Bank who have basically bought the debt, using the Santander guarantees as collateral.
His guess (and it can be no more than a guess at the moment, because the clubs want to keep it obscure) is that Spurs got 91m Euros (£75m), but it will cost Madrid around 100m (£86m) because Santander and Deutsche Bank need to make a profit.
Incidentally for the curious that would equate to an interest rate of about 6% - not far off a typical safe bet commercial loan rate or Euribor + 5%