Noone can say that they did not turn round the fortunes of Southend , which if my dim memory serves was , pretty much dead until they came in. Now it's got a healthy operation.
They've spent an awful lot of money, we'll call it healthy when they start seeing a return.
MME did work , so there cannot be any reason can't be again in the future.
Agian, depends what you mean by "did work" - make enough money to allow the owners to invest and develop the airport?