It was when I was dropping off the car, I was checking that it was included in the service as listed and as I was checking it was mentioned that it was an additional charge even though it's on the paperwork under the originally quoted price.
The fluid does need to be done, I'll just be very annoyed if it's extra considering it's in the schedule as a standard item for the service.
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Edit: A bit more research shows that it generally is in fact an additional item, even though it's listed in the schedule. Lesson learnt for me :)