It still doesn't need planning permission, as per the case officers report so won't be applied for.
Part 8 of the Town and Country Planning (General Permitted Development) (England) Order 2015 (as amended) namely being development on operational land, by a relevant airport operator (or its agent), in connection with the provision of services and facilities at a relevant airport. As such the proposal is permitted development and the Council has no objection.
The question to consider is are the proposed 8 new stands needed for expansion above 18 million or are they maintaining the status quo seeing that stands 80 and 81 have never been Code C stands and only 3 Code C stands from 16/17 will be taken over by Signature and moved to the east of taxiway Foxtrot. The airport will still end up with 5 new stands.