FWIW, it seems to me that this donor has effectively closed the door that some would have left by! Now they can rejoice and live in a false sense of security state, and start feeling comfortable with their lot and accountable to no-one. That is the problem.
They do NEED a new ideas man who will take only a small fee and they need new members on the board to re-invigorate the project so that by the end of the season they are cash safe. Going from one year to another is no longer an option. It must be tackled now. It, seemingly, is not the case.
The management has to change or it will all go stale. Most charities find that an all change policy is necessary at some point. TVOC are brazenly going along without direction and not knowing from where the next large tranche of cash is coming from.
Dr Pleming has to address this problem immediately - then go.