LTNman probably discounted Barling Magna as it has its own airstrip.
After reflection, I don't think Glyn Jones has said anything that he hasn't said before, it's just he's talking in far more grandiose terms. I like the analogy with the dam, it's a good way of explaining away the lack of operators, while telling us they're definitely coming any time soon.
I had hoped the airport would give the 'proximity to the City' and 'lack of slots elsewhere' rhetoric a rest, perhaps try another angle. No-one seems convinced by the 'London Airport' line no matter how many facts are thrown out there. And it definitely does not automatically follow that SEN will have airlines flooding in when capacity elsewhere is full.