Paul E,
I've just realised that you're probably referring to post 34087, which was my response to Networker's question relating to where BFC would find an additional £10m this year, should it be required. My answer was Barclays.
Your question: "Why are they paying JPMC a not inconsiderable amount of money if (as you say) Barclays are willing to stump up the required cash?" is not related to BFC's potential £10m shortfall this year. JPMC are investigating long-term refinancing of the existing loan of approximately £90m. JPMC are not being asked to find a lender for the additional £10m that may or may not be required this year, which, if it will be required, is most likely to be financed by Barclays in my view.
With respect, you're confusing two entirely separate sets of transactions.