Instead of being obsessed with mythical £20m and Peel etc perhaps, as Skyman alludes, you should wag the finger at the local authorities for an utter failure to operate in a commercial world and failure to adequately represent their constituents.
It's all a bit academic now so demanding enquiries and witch hunts isn't going to make an iota of difference to the fact that without PAX there are no flights and without flights there are no PAX, a self fulfilling prophecy which seems to be getting ever closer to becoming reality.
The big picture is there are too many airports chasing the market and tragically unless there is some serious re-invention DTV is going to be squashed by poor management, fate, the economy, competition and a multitude of other factors. Survival of the fittest....