Bagso
I think you can be sure that MAG will be making a submission by the deadline of 25 July (the consultation was launched back in early June). The Commission's website states that "This call for evidence focuses on the domestic and international connectivity provided by regional airports and airports serving London and the south east other than Heathrow and Gatwick, and considers what recommendations the Commission could usefully make to shape this national picture."
This isn't the first time that Davies has requested submissions from "regional airports", but either way it's another opportunity for MAG to state its case.
For those insomniacs out there the Davies document is at
https://www.gov.uk/government/upload...g-capacity.pdf