That's normal. On printed OCLI and Android App Boarding Passes, only LHR and LGW get that "Fast Track" statement. On iPhones a few European destinations get them too. The domestic ones don't appear.

The reason being is that actually the service offering will vary slightly according to your airport. You will get priority boarding everywhere (though not everytime at LBA, or they are very swift to move to main boarding!). As First you won't get Fast Track security everywhere - you do at LBA since all BA passengers get it, not at NCL, MAN I think you need a counter issued boarding pass, I think not at EDI but they may wave you through there since the check is now at the end of the channel. Lounge is consistent everywhere at least, and priority check in desks (except sometimes at LBA and IOM when they only have one operating desk).

Luckily at all of these airports, with the exception perhaps of JER on "changeover Saturday" in high summer, and MAN security, check-in, security and boarding is more civilised than at the big London airports for everyone.