Every return for these big matches now go to hospitality tickets IMO. I just had a look out of curiosity and you buy two general admission adult tickets together for £900, with a three course meal beforehand in a Manchester restaurant.
Tickets went in a flash on both releases as well for this, so it wouldn’t surprise me if the club released loads this way.
No wonder there are tourists and opposition fans in our end, they’d be the only ones who’d pay that kind of money. It wouldn’t surprise me at all if there are more incidents at this match for this precise reason.