This is how I read it. Relative to how the building is actually being built as below.
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1. The GA+ has always been planned, the seats are approved in that location (golden yellow or whatever colour that is). They link directly to a 300 ish capacity 'private' bar on the same level (Cross Bar). They can function as hospitality because of that. They do share the concourse the toilets and etc, but they do have their own bar that supprts that number. And are also in a prime location to merit the extra price.
2. The sky bar and suites up above the main tier remain unchanged. That was always separate and additional.
3. The city hall shown in blue has always been planned. That has never however been mooted as any level of premium or hospitality.
I am don't see the GA+ changing. Or relocating to the level above as
@HelloCity you have argued/shown. That makes no sense, neither how it would function, nor commercially. You'd be charging a premium to them out those 648 people into a 6300 capacity concourse bar. Why would anyone pay that. And what do you then do with the dedicated smaller 300 capacity bar below, if you move the seats away from it.
The question for me is, are the club upping the price of a portion of seats on that level to benefit from the city hall. And is that in addition to the GA+.
OR, are the seat relocations within the GA+ area to allow for the premium offering, and it is badly worded by the club. And they have used the city hall instead of the cross bar, to make it seem like a less hospitality driven move. If it were only for the club statement and the approval, I would think that to be the case. The emails to people sat in those seats do muddy it more though.