The Airport FS has a West Yorkshire Fire Call Sign - although it is not part of West Yorkshire Fire Service.
All emergencies are attended by West Yorkshire Fire Service, And depending on the Aircraft size, Depends on the number of appliances.
True, I also think 12 appliances plus 2 special units was a bit OTT??
I would have thought maybe 6 would have been enough.
LBA has 4 large FF appliances itself, Which can pump water at phenomenal rates, Compared to the WY appliances.
The modern Airport FF appliances are state of the art kit.
WY FS has an agreement with LBA, That if there was an incident around the airports perimeter/roads, Then the Airport FS would attend first, This being the locality.
The Airport FS & WY FS have regular training sessions together.