The BBC seem to have drawn their line with pulling out from probably the most known about folk festival after next year - Cambridge.

Where is the information about the BBC stopping their Cambridge sponsorship after next year please?

I think that news could actually be positive. At the moment the BBC heavily over-promote Cambridge at the expense of most of the other folk festivals. If they don't have a festival that is effectively "theirs" they might be a bit more even handed in covering other festivals.

Likewise, those that regularly go to Cambridge won't have to endure fighting for tickets with all those people who assume that Cambridge is the only folk festival because it is the only one the BBC extensively "advertise".